Annual report pursuant to Section 13 and 15(d)

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

v3.6.0.2
Loans and Leases - Allowance for Loan and Lease Losses (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Allowance for loan losses:                      
Balance at beginning of period       $ 42,935         $ 42,935    
(Negative provision) provision charged to operating expense $ 151 $ (1,450) $ (1,515) (1,525) $ (3,835) $ (3,704) $ (2,403) $ (1,672) (4,339) $ (11,614) $ (6,258)
Balance at end of period 32,429       42,935       32,429 42,935  
Allowance for loan losses [Member]                      
Allowance for loan losses:                      
Balance at beginning of period       42,935       52,666 42,935 52,666 57,555
Charge-offs                 (8,869) (3,531) (6,992)
Recoveries on loans and leases previously charged off                 2,702 5,423 8,361
Net loan and lease recoveries (charge-offs)                 (6,167) 1,892 1,369
(Negative provision) provision charged to operating expense                 (4,339) (11,623) (6,258)
Balance at end of period 32,429       42,935       32,429 42,935 52,666
Non-PCI Loans [Member]                      
Allowance for loan losses:                      
Balance at beginning of period       37,494       51,640 37,494 51,640  
Charge-offs                 (3,736) (3,531)  
Recoveries on loans and leases previously charged off                 2,702 5,423  
(Negative provision) provision charged to operating expense                 (5,002) (16,038)  
Balance at end of period 31,458       37,494       31,458 37,494 51,640
Non-PCI Loans [Member] | Allowance for loan losses [Member]                      
Allowance for loan losses:                      
Balance at beginning of period       37,494       51,640 37,494 51,640 57,555
Charge-offs                 (3,736) (3,531) (6,992)
Recoveries on loans and leases previously charged off                 2,702 5,423 8,361
Net loan and lease recoveries (charge-offs)                 (1,034) 1,892 1,369
(Negative provision) provision charged to operating expense                 (5,002) (16,038) (7,284)
Balance at end of period 31,458       37,494       31,458 37,494 51,640
PCI Loans [Member]                      
Allowance for loan losses:                      
Balance at beginning of period       5,441       1,026 5,441 1,026  
Charge-offs                 (5,133)    
(Negative provision) provision charged to operating expense                 663 4,415  
Balance at end of period 971       5,441       971 5,441 1,026
PCI Loans [Member] | Allowance for loan losses [Member]                      
Allowance for loan losses:                      
Balance at beginning of period       $ 5,441       $ 1,026 5,441 1,026 0
Charge-offs                 (5,133) 0 0
Recoveries on loans and leases previously charged off                 0 0 0
Net loan and lease recoveries (charge-offs)                 (5,133) 0 0
(Negative provision) provision charged to operating expense                 663 4,415 1,026
Balance at end of period $ 971       $ 5,441       $ 971 $ 5,441 $ 1,026