Quarterly report pursuant to Section 13 or 15(d)

Loans and Leases - Loans Receivable (Detail)

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Loans and Leases - Loans Receivable (Detail) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Mar. 31, 2016
Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable $ 3,943,951 $ 3,844,769    
Allowance for loan and lease losses (33,152) (32,429)    
Loans and leases receivable, net 3,910,799 3,812,340    
Real estate loans [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 3,348,875 3,278,375    
Real estate loans [Member] | Retail [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 909,986 859,953    
Real estate loans [Member] | Hospitality [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 652,114 651,158    
Real estate loans [Member] | Gas station [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 256,060 262,879    
Real estate loans [Member] | Other [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 1,115,898 1,109,656    
Real estate loans [Member] | Construction [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 56,072 55,962    
Real estate loans [Member] | Residential property [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 358,745 338,767    
Commercial and industrial loans [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 317,682 300,220    
Commercial and industrial loans [Member] | Commercial term [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 135,596 138,168    
Commercial and industrial loans [Member] | Commercial lines of credit [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 144,279 136,231    
Commercial and industrial loans [Member] | International loans [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 37,807 25,821    
Leases Receivable [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 259,591 243,294    
Consumer loans [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 17,803 22,880    
Consumer loans [Member] | Home equity line of credit [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 16,100 17,700    
Non-PCI Loans and Leases [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 3,934,991 3,834,906 $ 3,286,644  
Allowance for loan and lease losses (32,261) (31,458) (35,381) $ (37,494)
Loans and leases receivable, net 3,902,730 3,803,448    
Non-PCI Loans and Leases [Member] | Real estate loans [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 3,340,085 3,268,698    
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Retail [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 908,432 857,629    
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Hospitality [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 650,518 649,540    
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Gas station [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 253,437 260,187    
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Other [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 1,113,851 1,107,589    
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Construction [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 56,072 55,962    
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Residential property [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 357,775 337,791    
Non-PCI Loans and Leases [Member] | Commercial and industrial loans [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 317,562 300,084    
Non-PCI Loans and Leases [Member] | Commercial and industrial loans [Member] | Commercial term [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 135,476 138,032    
Non-PCI Loans and Leases [Member] | Commercial and industrial loans [Member] | Commercial lines of credit [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 144,279 136,231    
Non-PCI Loans and Leases [Member] | Commercial and industrial loans [Member] | International loans [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 37,807 25,821    
Non-PCI Loans and Leases [Member] | Leases Receivable [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 259,591 243,294    
Non-PCI Loans and Leases [Member] | Consumer loans [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 17,753 22,830    
PCI Loans and Leases [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 8,960 9,863 19,835  
Allowance for loan and lease losses (891) (971) (5,645) (5,441)
Loans and leases receivable, net 8,069 8,892 $ 14,190 $ 14,573
PCI Loans and Leases [Member] | Real estate loans [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 8,790 9,677    
PCI Loans and Leases [Member] | Real estate loans [Member] | Retail [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 1,554 2,324    
Allowance for loan and lease losses   (122)    
Loans and leases receivable, net   2,202    
PCI Loans and Leases [Member] | Real estate loans [Member] | Hospitality [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 1,596 1,618    
Allowance for loan and lease losses (140) (138)    
Loans and leases receivable, net 1,456 1,480    
PCI Loans and Leases [Member] | Real estate loans [Member] | Gas station [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 2,623 2,692    
Allowance for loan and lease losses (531) (589)    
Loans and leases receivable, net 2,092 2,103    
PCI Loans and Leases [Member] | Real estate loans [Member] | Other [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 2,047 2,067    
PCI Loans and Leases [Member] | Real estate loans [Member] | Construction [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 0 0    
PCI Loans and Leases [Member] | Real estate loans [Member] | Residential property [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 970 976    
Allowance for loan and lease losses (73) (72)    
Loans and leases receivable, net 897 904    
PCI Loans and Leases [Member] | Real estate loans [Member] | Commercial property [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 7,820 8,701    
PCI Loans and Leases [Member] | Commercial and industrial loans [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 120 136    
PCI Loans and Leases [Member] | Commercial and industrial loans [Member] | Commercial term [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 120 136    
Allowance for loan and lease losses (41) (41)    
Loans and leases receivable, net 79 95    
PCI Loans and Leases [Member] | Commercial and industrial loans [Member] | Commercial lines of credit [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 0 0    
PCI Loans and Leases [Member] | Commercial and industrial loans [Member] | International loans [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 0 0    
PCI Loans and Leases [Member] | Leases Receivable [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 0      
PCI Loans and Leases [Member] | Consumer loans [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total gross loans and leases receivable 50 50    
Allowance for loan and lease losses (8) (8)    
Loans and leases receivable, net $ 42 $ 42