Quarterly report pursuant to Section 13 or 15(d)

Loans and Leases - Non-Accrual Loans and Leases, Disaggregated by Class (Detail)

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Loans and Leases - Non-Accrual Loans and Leases, Disaggregated by Class (Detail) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total non-accrual Non-PCI loans and leases $ 18,283 $ 15,805
Real estate loans [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total non-accrual Non-PCI loans and leases 9,455 8,540
Real estate loans [Member] | Commercial property loans [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total non-accrual Non-PCI loans and leases 9,313 7,949
Real estate loans [Member] | Retail [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total non-accrual Non-PCI loans and leases 987 224
Real estate loans [Member] | Hospitality [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total non-accrual Non-PCI loans and leases 6,121 5,263
Real estate loans [Member] | Other [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total non-accrual Non-PCI loans and leases 2,205 2,462
Real estate loans [Member] | Residential property [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total non-accrual Non-PCI loans and leases 142 591
Commercial and industrial loans [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total non-accrual Non-PCI loans and leases 2,974 1,892
Leases Receivable [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total non-accrual Non-PCI loans and leases 5,093 4,452
Consumer loans [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total non-accrual Non-PCI loans and leases $ 761 $ 921