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
Sep. 30, 2018
Jun. 30, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable $ 4,582,883   $ 4,304,458      
Allowance for loan and lease losses (31,676)   (31,043)      
Loans and leases receivable, net 4,551,207   4,273,415      
Real estate loans [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 3,792,350   3,590,914      
Real estate loans [Member] | Commercial property loan [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 3,207,700   3,013,871      
Real estate loans [Member] | Retail [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 924,007   915,273      
Real estate loans [Member] | Hospitality [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 809,287   681,325      
Real estate loans [Member] | Other [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 1,474,406   1,417,273      
Real estate loans [Member] | Construction [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 67,682   55,190      
Real estate loans [Member] | Residential property [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 516,968   521,853      
Commercial and industrial loans [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 396,383   399,201      
Commercial and industrial loans [Member] | Commercial term [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 186,249   182,685      
Commercial and industrial loans [Member] | Commercial lines of credit [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 178,570   181,894      
Commercial and industrial loans [Member] | International loans [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 31,564   34,622      
Leases Receivable [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 379,455   297,284      
Consumer loans [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 14,695   17,059      
Non-PCI Loans and Leases [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 4,582,883   4,304,458 $ 4,195,355    
Allowance for loan and lease losses (31,676) $ (31,818) (31,043) $ (32,492) $ (33,758) $ (32,429)
Non-PCI Loans and Leases [Member] | Real estate loans [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 3,792,350   3,590,914      
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 924,007   915,273      
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 809,287   681,325      
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 67,682   55,190      
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 516,968   521,853      
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 396,383   399,201      
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 186,249   182,685      
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 178,570   181,894      
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 31,564   34,622      
Non-PCI Loans and Leases [Member] | Leases Receivable [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 379,455   297,284      
Non-PCI Loans and Leases [Member] | Consumer loans [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable $ 14,695   $ 17,059