Quarterly report pursuant to Section 13 or 15(d)

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

v3.4.0.3
Loans - Allowance for Loan Losses by Portfolio Segment (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Allowance for loan losses:    
Balance at beginning of period $ 42,935  
(Negative provision) provision (1,525) $ (1,673)
Balance at end of period 41,026  
Loans receivable:    
Ending balance 3,306,479  
Non-PCI Loans [Member]    
Allowance for loan losses:    
Balance at beginning of period 37,494 51,640
Charge-offs (637) (34)
Recoveries on loans previously charged off 253 1,692
(Negative provision) provision (1,729) (1,783)
Balance at end of period 35,381 51,515
Ending balance: individually evaluated for impairment 4,093 5,299
Ending balance: collectively evaluated for impairment 31,288 46,216
Loans receivable:    
Ending balance 3,286,644 2,775,616
Ending balance: individually evaluated for impairment 32,736 46,930
Ending balance: collectively evaluated for impairment 3,253,908 2,728,686
Non-PCI Loans [Member] | Real estate loans [Member]    
Allowance for loan losses:    
Balance at beginning of period 29,800 41,194
Charge-offs (535) 0
Recoveries on loans previously charged off 93 32
(Negative provision) provision (1,080) 1,324
Balance at end of period 28,278 42,550
Ending balance: individually evaluated for impairment 3,334 3,386
Ending balance: collectively evaluated for impairment 24,944 39,164
Loans receivable:    
Ending balance 2,966,390 2,499,323
Ending balance: individually evaluated for impairment 25,595 33,537
Ending balance: collectively evaluated for impairment 2,940,795 2,465,786
Non-PCI Loans [Member] | Commercial and industrial loans [Member]    
Allowance for loan losses:    
Balance at beginning of period 7,081 9,142
Charge-offs (102) (34)
Recoveries on loans previously charged off 160 1,660
(Negative provision) provision (850) (2,982)
Balance at end of period 6,289 7,786
Ending balance: individually evaluated for impairment 759 1,913
Ending balance: collectively evaluated for impairment 5,530 5,873
Loans receivable:    
Ending balance 295,471 250,351
Ending balance: individually evaluated for impairment 6,441 11,570
Ending balance: collectively evaluated for impairment 289,030 238,781
Non-PCI Loans [Member] | Consumer loans [Member]    
Allowance for loan losses:    
Balance at beginning of period 242 220
Charge-offs 0 0
Recoveries on loans previously charged off 0 0
(Negative provision) provision 13 (35)
Balance at end of period 255 185
Ending balance: individually evaluated for impairment 0 0
Ending balance: collectively evaluated for impairment 255 185
Loans receivable:    
Ending balance 24,783 25,942
Ending balance: individually evaluated for impairment 700 1,823
Ending balance: collectively evaluated for impairment 24,083 24,119
Non-PCI Loans [Member] | Unallocated [Member]    
Allowance for loan losses:    
Balance at beginning of period 371 1,084
Charge-offs 0 0
Recoveries on loans previously charged off 0 0
(Negative provision) provision 188 (90)
Balance at end of period 559 994
Ending balance: individually evaluated for impairment 0 0
Ending balance: collectively evaluated for impairment 559 994
Loans receivable:    
Ending balance 0 0
Ending balance: individually evaluated for impairment 0 0
Ending balance: collectively evaluated for impairment 0 0
PCI Loans [Member]    
Allowance for loan losses:    
Balance at beginning of period 5,441 1,026
Charge-offs   (52)
Recoveries on loans previously charged off   352
(Negative provision) provision 204 110
Balance at end of period 5,645 1,436
Loans receivable:    
Ending balance 19,835 40,941
PCI Loans [Member] | Real estate loans [Member]    
Allowance for loan losses:    
Balance at beginning of period 5,397 895
Charge-offs   (52)
Recoveries on loans previously charged off   0
(Negative provision) provision 202 475
Balance at end of period 5,599 1,318
Loans receivable:    
Ending balance 19,625 40,616
PCI Loans [Member] | Commercial and industrial loans [Member]    
Allowance for loan losses:    
Balance at beginning of period 42 131
Charge-offs   0
Recoveries on loans previously charged off   352
(Negative provision) provision 2 (365)
Balance at end of period 44 118
Loans receivable:    
Ending balance 161 281
PCI Loans [Member] | Consumer loans [Member]    
Allowance for loan losses:    
Balance at beginning of period 2 0
Charge-offs   0
Recoveries on loans previously charged off   0
(Negative provision) provision 0 0
Balance at end of period 2 0
Loans receivable:    
Ending balance 49 44
PCI Loans [Member] | Unallocated [Member]    
Allowance for loan losses:    
Balance at beginning of period 0 0
Charge-offs   0
Recoveries on loans previously charged off   0
(Negative provision) provision 0 0
Balance at end of period 0 0
Loans receivable:    
Ending balance $ 0 $ 0