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, 2017
Jun. 30, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable $ 4,195,355   $ 3,844,769      
Allowance for loan and lease losses (32,492)   (32,429)      
Loans and leases receivable, net 4,162,863   3,812,340      
Real estate loans [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 3,539,558   3,278,375      
Real estate loans [Member] | Retail [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 917,823   859,953      
Real estate loans [Member] | Hospitality [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 733,226   651,158      
Real estate loans [Member] | Gas station [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 247,430   262,879      
Real estate loans [Member] | Other [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 1,146,189   1,109,656      
Real estate loans [Member] | Construction [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 64,263   55,962      
Real estate loans [Member] | Residential property [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 430,627   338,767      
Commercial and industrial loans [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 364,456   300,220      
Commercial and industrial loans [Member] | Commercial term [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 170,942   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 149,937   136,231      
Commercial and industrial loans [Member] | International loans [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 43,577   25,821      
Leases Receivable [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 272,271   243,294      
Consumer loans [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 19,070   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 14,700   17,700      
Non-PCI Loans and Leases [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 4,186,651   3,834,906 $ 3,537,119    
Allowance for loan and lease losses (31,698) $ (33,038) (31,458) (33,439) $ (34,259) $ (37,494)
Loans and leases receivable, net 4,154,953   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 3,530,948   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 916,236   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 731,562   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 245,042   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 1,144,176   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 64,263   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 429,669   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 364,405   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 170,891   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 149,937   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 43,577   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 272,271   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 19,027   22,830      
PCI Loans and Leases [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 8,704   9,863 15,540    
Allowance for loan and lease losses (794) $ (720) (971) (5,533) $ (5,448) (5,441)
Loans and leases receivable, net 7,910   8,892 $ 10,007   $ 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 8,610   9,677      
Allowance for loan and lease losses (752)   (922)      
Loans and leases receivable, net 7,858   8,755      
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 1,587   2,324      
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 1,664   1,618      
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 2,388   2,692      
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 2,013   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 958   976      
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 7,652   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 51   136      
Allowance for loan and lease losses (41)   (41)      
Loans and leases receivable, net 10   95      
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 51   136      
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   0      
PCI Loans and Leases [Member] | Consumer loans [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 43   50      
Allowance for loan and lease losses (1)   (8)      
Loans and leases receivable, net $ 42   $ 42