Annual report pursuant to Section 13 and 15(d)

Loans and Leases - Analysis of Gross Loans and Leases, Disaggregated by Class (Detail)

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Loans and Leases - Analysis of Gross Loans and Leases, Disaggregated by Class (Detail) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and Leases $ 4,600,540 $ 4,304,458
Real estate loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and Leases 3,758,355 3,590,914
Real estate loans | Hospitality    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and Leases 830,679 681,325
Real estate loans | Construction    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and Leases 71,583 55,190
Real estate loans | Residential property    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and Leases 500,563 521,853
Commercial and industrial loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and Leases 429,903 399,201
Commercial and industrial loans | Commercial term    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and Leases 206,691 182,685
Commercial and industrial loans | Commercial lines of credit    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and Leases 194,032 181,894
Commercial and industrial loans | International loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and Leases 29,180 34,622
Leases receivable    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and Leases 398,858 297,284
Consumer loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans and Leases 13,424 17,059
30-59 Days Past Due | Commercial and industrial loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 334  
30-59 Days Past Due | Commercial and industrial loans | International loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 0  
30-59 Days Past Due | Leases receivable    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 4,681 2,295
Non-PCI Loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 22,355 17,529
Current 4,578,185 4,286,929
Total loans and Leases 4,600,540 4,304,458
Non-PCI Loans | Real estate loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 10,859 8,478
Current 3,747,496 3,582,436
Total loans and Leases 3,758,355 3,590,914
Non-PCI Loans | Real estate loans | Total commercial property loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 6,595 7,869
Current 3,179,614 3,006,002
Total loans and Leases 3,186,209 3,013,871
Non-PCI Loans | Real estate loans | Retail    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 1,207 741
Current 905,053 914,532
Total loans and Leases 906,260 915,273
Non-PCI Loans | Real estate loans | Hospitality    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 3,161 3,987
Current 827,518 677,338
Total loans and Leases 830,679 681,325
Non-PCI Loans | Real estate loans | Other    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 2,227 3,141
Current 1,447,043 1,414,132
Total loans and Leases 1,449,270 1,417,273
Non-PCI Loans | Real estate loans | Construction    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 0 0
Current 71,583 55,190
Total loans and Leases 71,583 55,190
Non-PCI Loans | Real estate loans | Residential property    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 4,264 609
Current 496,299 521,244
Total loans and Leases 500,563 521,853
Non-PCI Loans | Commercial and industrial loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 2,087 2,258
Current 427,816 396,943
Total loans and Leases 429,903 399,201
Non-PCI Loans | Commercial and industrial loans | Commercial term    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 1,500 1,826
Current 205,191 180,859
Total loans and Leases 206,691 182,685
Non-PCI Loans | Commercial and industrial loans | Commercial lines of credit    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 587 432
Current 193,445 181,462
Total loans and Leases 194,032 181,894
Non-PCI Loans | Commercial and industrial loans | International loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 0 0
Current 29,180 34,622
Total loans and Leases 29,180 34,622
Non-PCI Loans | Leases receivable    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 9,263 6,793
Current 389,595 290,491
Total loans and Leases 398,858 297,284
Non-PCI Loans | Consumer loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 146 0
Current 13,278 17,059
Total loans and Leases 13,424 17,059
Non-PCI Loans | 30-59 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 10,210 8,346
Non-PCI Loans | 30-59 Days Past Due | Real estate loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 5,049 5,371
Non-PCI Loans | 30-59 Days Past Due | Real estate loans | Total commercial property loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 1,102 4,762
Non-PCI Loans | 30-59 Days Past Due | Real estate loans | Retail    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 221 96
Non-PCI Loans | 30-59 Days Past Due | Real estate loans | Hospitality    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 65 3,421
Non-PCI Loans | 30-59 Days Past Due | Real estate loans | Other    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 816 1,245
Non-PCI Loans | 30-59 Days Past Due | Real estate loans | Construction    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 0 0
Non-PCI Loans | 30-59 Days Past Due | Real estate loans | Residential property    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 3,947 609
Non-PCI Loans | 30-59 Days Past Due | Commercial and industrial loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable   680
Non-PCI Loans | 30-59 Days Past Due | Commercial and industrial loans | Commercial term    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 334 430
Non-PCI Loans | 30-59 Days Past Due | Commercial and industrial loans | Commercial lines of credit    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 0 250
Non-PCI Loans | 30-59 Days Past Due | Commercial and industrial loans | International loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable   0
Non-PCI Loans | 30-59 Days Past Due | Consumer loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 146 0
Non-PCI Loans | 60-89 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 2,576 3,027
Non-PCI Loans | 60-89 Days Past Due | Real estate loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 1,682 1,516
Non-PCI Loans | 60-89 Days Past Due | Real estate loans | Total commercial property loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 1,409 1,516
Non-PCI Loans | 60-89 Days Past Due | Real estate loans | Retail    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 0 15
Non-PCI Loans | 60-89 Days Past Due | Real estate loans | Hospitality    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 1,203 168
Non-PCI Loans | 60-89 Days Past Due | Real estate loans | Other    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 206 1,333
Non-PCI Loans | 60-89 Days Past Due | Real estate loans | Construction    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 0 0
Non-PCI Loans | 60-89 Days Past Due | Real estate loans | Residential property    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 273 0
Non-PCI Loans | 60-89 Days Past Due | Commercial and industrial loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 49 567
Non-PCI Loans | 60-89 Days Past Due | Commercial and industrial loans | Commercial term    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 49 567
Non-PCI Loans | 60-89 Days Past Due | Commercial and industrial loans | Commercial lines of credit    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 0 0
Non-PCI Loans | 60-89 Days Past Due | Commercial and industrial loans | International loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 0 0
Non-PCI Loans | 60-89 Days Past Due | Leases receivable    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 845 944
Non-PCI Loans | 60-89 Days Past Due | Consumer loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 0 0
Non-PCI Loans | 90 Days or More Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 9,569 6,156
Non-PCI Loans | 90 Days or More Past Due | Real estate loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 4,128 1,591
Non-PCI Loans | 90 Days or More Past Due | Real estate loans | Total commercial property loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 4,084 1,591
Non-PCI Loans | 90 Days or More Past Due | Real estate loans | Retail    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 986 630
Non-PCI Loans | 90 Days or More Past Due | Real estate loans | Hospitality    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 1,893 398
Non-PCI Loans | 90 Days or More Past Due | Real estate loans | Other    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 1,205 563
Non-PCI Loans | 90 Days or More Past Due | Real estate loans | Construction    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 0 0
Non-PCI Loans | 90 Days or More Past Due | Real estate loans | Residential property    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 44 0
Non-PCI Loans | 90 Days or More Past Due | Commercial and industrial loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 1,704 1,011
Non-PCI Loans | 90 Days or More Past Due | Commercial and industrial loans | Commercial term    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 1,117 829
Non-PCI Loans | 90 Days or More Past Due | Commercial and industrial loans | Commercial lines of credit    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 587 182
Non-PCI Loans | 90 Days or More Past Due | Commercial and industrial loans | International loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 0 0
Non-PCI Loans | 90 Days or More Past Due | Leases receivable    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable 3,737 3,554
Non-PCI Loans | 90 Days or More Past Due | Consumer loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past due loans and leases receivable $ 0 $ 0