Annual report pursuant to Section 13 and 15(d)

Loans and Leases - Allowance for Loan and Lease Losses (Detail)

v3.8.0.1
Loans and Leases - Allowance for Loan and Lease Losses (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Allowance for loan losses:                      
Balance at beginning of period       $ 32,429         $ 32,429    
Loan and lease loss provision (income) $ 220 $ 269 $ 422 (80) $ 151 $ (1,450) $ (1,515) $ (1,525) 831 $ (4,339) $ (11,614)
Balance at end of period 31,043       32,429       31,043 32,429  
Allowance for loan losses [Member]                      
Allowance for loan losses:                      
Balance at beginning of period       32,429       42,935 32,429 42,935 52,666
Charge-offs                 (5,899) (8,869) (3,531)
Recoveries on loans and leases previously charged off                 3,682 2,702 5,423
Net loan and lease charge-offs                 (2,217) (6,167) 1,892
Loan and lease loss provision (income)                 831 (4,339) (11,623)
Balance at end of period 31,043       32,429       31,043 32,429 42,935
Non-PCI Loans [Member]                      
Allowance for loan losses:                      
Balance at beginning of period       31,458       37,494 31,458 37,494  
Charge-offs                 (5,899) (3,736)  
Recoveries on loans and leases previously charged off                 3,682 2,702  
Loan and lease loss provision (income)                 1,482 (5,002)  
Balance at end of period 30,723       31,458       30,723 31,458 37,494
Non-PCI Loans [Member] | Allowance for loan losses [Member]                      
Allowance for loan losses:                      
Balance at beginning of period       31,458       37,494 31,458 37,494 51,640
Charge-offs                 (5,899) (3,736) (3,531)
Recoveries on loans and leases previously charged off                 3,682 2,702 5,423
Net loan and lease charge-offs                 (2,217) (1,034) 1,892
Loan and lease loss provision (income)                 1,482 (5,002) (16,038)
Balance at end of period 30,723       31,458       30,723 31,458 37,494
PCI Loans [Member]                      
Allowance for loan losses:                      
Balance at beginning of period       971       5,441 971 5,441  
Charge-offs                   (5,133)  
Loan and lease loss provision (income)                 (651) 663  
Balance at end of period 320       971       320 971 5,441
PCI Loans [Member] | Allowance for loan losses [Member]                      
Allowance for loan losses:                      
Balance at beginning of period       $ 971       $ 5,441 971 5,441 1,026
Charge-offs                 0 (5,133) 0
Recoveries on loans and leases previously charged off                 0 0 0
Net loan and lease charge-offs                 0 (5,133) 0
Loan and lease loss provision (income)                 (651) 663 4,415
Balance at end of period $ 320       $ 971       $ 320 $ 971 $ 5,441