Quarterly report pursuant to Section 13 or 15(d)

Loans - Allowance for Loan Losses and Allowance for Off-Balance Sheet Items (Detail)

v3.3.0.814
Loans - Allowance for Loan Losses and Allowance for Off-Balance Sheet Items (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Allowance for loan losses:        
Balance at beginning of period     $ 52,666  
Balance at end of period $ 46,360   46,360  
Allowance for loan losses [Member]        
Allowance for loan losses:        
Balance at beginning of period 50,820 $ 51,886 52,666 $ 57,555
Charge-offs (1,748) (1,418) (3,004) (5,569)
Recoveries on loans previously charged off 992 663 4,477 6,656
Net loan (charge-offs) recoveries (756) (755) 1,473 1,087
(Negative provision) provision charged to operating expense (3,704) 48 (7,779) (7,463)
Balance at end of period 46,360 51,179 46,360 51,179
Allowance for off-balance sheet items [Member]        
Allowance for loan losses:        
Balance at beginning of period 962 1,592 1,366 1,247
(Negative provision) provision charged to operating expense (406) (48) (810) 297
Balance at end of period 556 1,544 556 1,544
Non-PCI Loans [Member]        
Allowance for loan losses:        
Balance at beginning of period 49,468 51,886 51,640 57,555
Charge-offs (1,748) (1,418) (3,004) (5,569)
Recoveries on loans previously charged off 992 663 4,477 6,656
(Negative provision) provision charged to operating expense (5,490) 48 (9,891) (7,463)
Balance at end of period 43,222 $ 51,179 43,222 $ 51,179
Non-PCI Loans [Member] | Allowance for loan losses [Member]        
Allowance for loan losses:        
Balance at beginning of period 49,468   51,640  
Charge-offs (1,748)   (3,004)  
Recoveries on loans previously charged off 992   4,477  
Net loan (charge-offs) recoveries (756)   1,473  
(Negative provision) provision charged to operating expense (5,490)   (9,891)  
Balance at end of period 43,222   43,222  
Non-PCI Loans [Member] | Allowance for off-balance sheet items [Member]        
Allowance for loan losses:        
Balance at beginning of period 962   1,366  
(Negative provision) provision charged to operating expense (406)   (810)  
Balance at end of period 556   556  
PCI Loans [Member]        
Allowance for loan losses:        
Balance at beginning of period 1,352   1,026  
(Negative provision) provision charged to operating expense 1,786   2,112  
Balance at end of period 3,138   3,138  
PCI Loans [Member] | Allowance for loan losses [Member]        
Allowance for loan losses:        
Balance at beginning of period 1,352   1,026  
Charge-offs 0   0  
Recoveries on loans previously charged off 0   0  
Net loan (charge-offs) recoveries 0   0  
(Negative provision) provision charged to operating expense 1,786   2,112  
Balance at end of period 3,138   3,138  
PCI Loans [Member] | Allowance for off-balance sheet items [Member]        
Allowance for loan losses:        
Balance at beginning of period 0   0  
(Negative provision) provision charged to operating expense 0   0  
Balance at end of period $ 0   $ 0