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
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable $ 4,073,062   $ 3,844,769      
Allowance for loan and lease losses (33,758)   (32,429)      
Loans and leases receivable, net 4,039,304   3,812,340      
Real estate loans [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 3,451,025   3,278,375      
Real estate loans [Member] | Retail [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 916,113   859,953      
Real estate loans [Member] | Hospitality [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 739,067   651,158      
Real estate loans [Member] | Gas station [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 249,929   262,879      
Real estate loans [Member] | Other [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 1,104,100   1,109,656      
Real estate loans [Member] | Construction [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 58,159   55,962      
Real estate loans [Member] | Residential property [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 383,657   338,767      
Commercial and industrial loans [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 347,236   300,220      
Commercial and industrial loans [Member] | Commercial term [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 159,487   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 148,421   136,231      
Commercial and industrial loans [Member] | International loans [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 39,328   25,821      
Leases Receivable [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 257,525   243,294      
Consumer loans [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 17,276   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 15,100   17,700      
Non-PCI Loans and Leases [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 4,064,278   3,834,906 $ 3,434,290    
Allowance for loan and lease losses (33,038) $ (32,261) (31,458) (34,259) $ (35,381) $ (37,494)
Loans and leases receivable, net 4,031,240   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 3,442,340   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 914,470   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 737,369   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 247,566   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 1,102,084   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 58,159   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 382,692   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 347,181   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 159,432   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 148,421   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 39,328   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 257,525   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 17,232   22,830      
PCI Loans and Leases [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total gross loans and leases receivable 8,784   9,863 15,020    
Allowance for loan and lease losses (720) $ (891) (971) (5,448) $ (5,645) (5,441)
Loans and leases receivable, net 8,064   8,892 $ 9,572   $ 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 8,685   9,677      
Allowance for loan and lease losses (658)   (922)      
Loans and leases receivable, net 8,027   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 1,643   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 1,698   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 2,363   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 2,016   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 965   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 7,720   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 55   136      
Allowance for loan and lease losses (41)   (41)      
Loans and leases receivable, net 14   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 55   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 44   50      
Allowance for loan and lease losses (21)   (8)      
Loans and leases receivable, net $ 23   $ 42