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 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Allowance for loan losses:          
Balance at beginning of period     $ 32,429    
Loan and lease loss provision (income) $ 269 $ (1,450) 611 $ (4,490)  
Balance at end of period 32,492   32,492    
Loans receivable:          
Total Loans and leases receivable 4,195,355   4,195,355   $ 3,844,769
Non-PCI Loans and Leases [Member]          
Allowance for loan losses:          
Balance at beginning of period 33,038 34,259 31,458 37,494  
Charge-offs (2,405) (111) (3,256) (1,410)  
Recoveries on loans and leases previously charged off 871 831 2,709 2,079  
Loan and lease loss provision (income) 194 (1,540) 787 (4,724)  
Balance at end of period 31,698 33,439 31,698 33,439  
Ending balance: individually evaluated for impairment 6,421 3,218 6,421 3,218  
Ending balance: collectively evaluated for impairment 25,277 30,221 25,277 30,221  
Loans receivable:          
Total Loans and leases receivable 4,186,651 3,537,119 4,186,651 3,537,119 3,834,906
Ending balance: individually evaluated for impairment 27,499 23,907 27,499 23,907  
Ending balance: collectively evaluated for impairment 4,159,152 3,513,212 4,159,152 3,513,212  
Non-PCI Loans and Leases [Member] | Real estate loans [Member]          
Allowance for loan losses:          
Balance at beginning of period 22,762 28,116 25,212 29,800  
Charge-offs (146) (18) (289) (709)  
Recoveries on loans and leases previously charged off 343 337 1,434 527  
Loan and lease loss provision (income) (3,374) (479) (6,772) (1,662)  
Balance at end of period 19,585 27,956 19,585 27,956  
Ending balance: individually evaluated for impairment 3,882 2,723 3,882 2,723  
Ending balance: collectively evaluated for impairment 15,703 25,233 15,703 25,233  
Loans receivable:          
Total Loans and leases receivable 3,530,948 3,195,332 3,530,948 3,195,332  
Ending balance: individually evaluated for impairment 19,466 18,522 19,466 18,522  
Ending balance: collectively evaluated for impairment 3,511,482 3,176,810 3,511,482 3,176,810  
Non-PCI Loans and Leases [Member] | Commercial and industrial loans [Member]          
Allowance for loan losses:          
Balance at beginning of period 6,979 5,502 5,582 7,081  
Charge-offs (1,976) (93) (2,017) (701)  
Recoveries on loans and leases previously charged off 308 494 1,021 1,499  
Loan and lease loss provision (income) 1,183 (622) 1,908 (2,598)  
Balance at end of period 6,494 5,281 6,494 5,281  
Ending balance: individually evaluated for impairment 531 495 531 495  
Ending balance: collectively evaluated for impairment 5,963 4,786 5,963 4,786  
Loans receivable:          
Total Loans and leases receivable 364,405 319,521 364,405 319,521  
Ending balance: individually evaluated for impairment 3,610 4,705 3,610 4,705  
Ending balance: collectively evaluated for impairment 360,795 314,816 360,795 314,816  
Non-PCI Loans and Leases [Member] | Leases Receivable [Member]          
Allowance for loan losses:          
Balance at beginning of period 2,033 0 307 0  
Charge-offs (283) 0 (950) 0  
Recoveries on loans and leases previously charged off 220 0 239 0  
Loan and lease loss provision (income) 2,867 0 5,241 0  
Balance at end of period 4,837 0 4,837 0  
Ending balance: individually evaluated for impairment 2,008 0 2,008 0  
Ending balance: collectively evaluated for impairment 2,829 0 2,829 0  
Loans receivable:          
Total Loans and leases receivable 272,271 0 272,271 0  
Ending balance: individually evaluated for impairment 3,378 0 3,378 0  
Ending balance: collectively evaluated for impairment 268,893 0 268,893 0  
Non-PCI Loans and Leases [Member] | Consumer loans [Member]          
Allowance for loan losses:          
Balance at beginning of period 87 242 191 242  
Charge-offs 0 0 0 0  
Recoveries on loans and leases previously charged off 0 0 15 53  
Loan and lease loss provision (income) (23) (40) (142) (93)  
Balance at end of period 64 202 64 202  
Ending balance: individually evaluated for impairment 0 0 0 0  
Ending balance: collectively evaluated for impairment 64 202 64 202  
Loans receivable:          
Total Loans and leases receivable 19,027 22,266 19,027 22,266  
Ending balance: individually evaluated for impairment 1,045 680 1,045 680  
Ending balance: collectively evaluated for impairment 17,982 21,586 17,982 21,586  
Non-PCI Loans and Leases [Member] | Unallocated [Member]          
Allowance for loan losses:          
Balance at beginning of period 1,177 399 166 371  
Charge-offs 0 0 0 0  
Recoveries on loans and leases previously charged off 0 0 0 0  
Loan and lease loss provision (income) (459) (399) 552 (371)  
Balance at end of period 718 0 718 0  
Ending balance: individually evaluated for impairment 0 0 0 0  
Ending balance: collectively evaluated for impairment 718 0 718 0  
Loans receivable:          
Total Loans and leases receivable 0 0 0 0  
Ending balance: individually evaluated for impairment 0 0 0 0  
Ending balance: collectively evaluated for impairment 0 0 0 0  
PCI Loans and Leases [Member]          
Allowance for loan losses:          
Balance at beginning of period 720 5,448 971 5,441  
Charge-offs 0 (5) 0 (142)  
Loan and lease loss provision (income) 74 90 (177) 234  
Balance at end of period 794 5,533 794 5,533  
Loans receivable:          
Total Loans and leases receivable 8,704 15,540 8,704 15,540 $ 9,863
PCI Loans and Leases [Member] | Real estate loans [Member]          
Allowance for loan losses:          
Balance at beginning of period 671 5,400 922 5,397  
Charge-offs 0 (5) 0 (142)  
Loan and lease loss provision (income) 81 89 (170) 229  
Balance at end of period 752 5,484 752 5,484  
Loans receivable:          
Total Loans and leases receivable 8,610 15,355 8,610 15,355  
PCI Loans and Leases [Member] | Commercial and industrial loans [Member]          
Allowance for loan losses:          
Balance at beginning of period 41 41 41 42  
Charge-offs 0 0 0 0  
Loan and lease loss provision (income) 0 1 0 0  
Balance at end of period 41 42 41 42  
Loans receivable:          
Total Loans and leases receivable 51 135 51 135  
PCI Loans and Leases [Member] | Leases Receivable [Member]          
Allowance for loan losses:          
Balance at beginning of period 0 0 0 0  
Charge-offs 0 0 0 0  
Loan and lease loss provision (income) 0 0 0 0  
Balance at end of period 0 0 0 0  
Loans receivable:          
Total Loans and leases receivable 0 0 0 0  
PCI Loans and Leases [Member] | Consumer loans [Member]          
Allowance for loan losses:          
Balance at beginning of period 8 7 8 2  
Charge-offs 0 0 0 0  
Loan and lease loss provision (income) (7) 0 (7) 5  
Balance at end of period 1 7 1 7  
Loans receivable:          
Total Loans and leases receivable 43 50 43 50  
PCI Loans and Leases [Member] | Unallocated [Member]          
Allowance for loan losses:          
Balance at beginning of period 0 0 0 0  
Charge-offs 0 0 0 0  
Loan and lease loss provision (income) 0 0 0 0  
Balance at end of period 0 0 0 0  
Loans receivable:          
Total Loans and leases receivable $ 0 $ 0 $ 0 $ 0