Quarterly report pursuant to Section 13 or 15(d)

Loans and Leases - Allowance for Loan Losses by Portfolio Segment (Detail)

v3.8.0.1
Loans and Leases - Allowance for Loan Losses by Portfolio Segment (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Allowance for loan losses:      
Balance at beginning of period $ 31,043    
Loan and lease loss provision (income) 649 $ (80)  
Balance at end of period 31,777    
Loans receivable:      
Total Loans and leases receivable 4,413,557   $ 4,304,458
Non-PCI Loans and Leases [Member]      
Allowance for loan losses:      
Balance at beginning of period 31,043 32,429  
Charge-offs (1,632) (186)  
Recoveries on loans and leases previously charged off 1,717 989  
Loan and lease loss provision (income) 649 (80)  
Balance at end of period 31,777 33,152  
Ending balance: individually evaluated for impairment 3,016 4,547  
Ending balance: collectively evaluated for impairment 28,761 28,605  
Loans receivable:      
Total Loans and leases receivable 4,413,557 3,943,951 $ 4,304,458
Individually evaluated for impairment 26,450 24,944  
Collectively evaluated for impairment 4,387,107 3,919,007  
Non-PCI Loans and Leases [Member] | Real estate loans [Member]      
Allowance for loan losses:      
Balance at beginning of period 17,012 26,134  
Charge-offs (989) (104)  
Recoveries on loans and leases previously charged off 885 712  
Loan and lease loss provision (income) 732 (1,140)  
Balance at end of period 17,640 25,602  
Ending balance: individually evaluated for impairment 1,549 3,756  
Ending balance: collectively evaluated for impairment 16,091 21,846  
Loans receivable:      
Total Loans and leases receivable 3,667,797 3,348,875  
Individually evaluated for impairment 18,513 20,795  
Collectively evaluated for impairment 3,649,284 3,328,080  
Non-PCI Loans and Leases [Member] | Commercial and industrial loans [Member]      
Allowance for loan losses:      
Balance at beginning of period 7,400 5,623  
Charge-offs (279) (40)  
Recoveries on loans and leases previously charged off 736 277  
Loan and lease loss provision (income) (967) 95  
Balance at end of period 6,890 5,955  
Ending balance: individually evaluated for impairment 357 791  
Ending balance: collectively evaluated for impairment 6,533 5,164  
Loans receivable:      
Total Loans and leases receivable 409,380 317,682  
Individually evaluated for impairment 2,843 3,828  
Collectively evaluated for impairment 406,537 313,854  
Non-PCI Loans and Leases [Member] | Leases Receivable [Member]      
Allowance for loan losses:      
Balance at beginning of period 6,279 307  
Charge-offs (364) (42)  
Recoveries on loans and leases previously charged off 95 0  
Loan and lease loss provision (income) 1,100 715  
Balance at end of period 7,110 980  
Ending balance: individually evaluated for impairment 1,110 0  
Ending balance: collectively evaluated for impairment 6,000 980  
Loans receivable:      
Total Loans and leases receivable 321,481 259,591  
Individually evaluated for impairment 4,200 0  
Collectively evaluated for impairment 317,281 259,591  
Non-PCI Loans and Leases [Member] | Consumer loans [Member]      
Allowance for loan losses:      
Balance at beginning of period 122 199  
Charge-offs 0 0  
Recoveries on loans and leases previously charged off 1 0  
Loan and lease loss provision (income) 2 (69)  
Balance at end of period 125 130  
Ending balance: individually evaluated for impairment 0 0  
Ending balance: collectively evaluated for impairment 125 130  
Loans receivable:      
Total Loans and leases receivable 14,899 17,803  
Individually evaluated for impairment 894 321  
Collectively evaluated for impairment 14,005 17,482  
Non-PCI Loans and Leases [Member] | Unallocated [Member]      
Allowance for loan losses:      
Balance at beginning of period 230 166  
Charge-offs 0 0  
Recoveries on loans and leases previously charged off 0 0  
Loan and lease loss provision (income) (218) 319  
Balance at end of period 12 485  
Ending balance: individually evaluated for impairment 0 0  
Ending balance: collectively evaluated for impairment 12 485  
Loans receivable:      
Total Loans and leases receivable 0 0  
Individually evaluated for impairment 0 0  
Collectively evaluated for impairment $ 0 $ 0