Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Estimated Fair Values of Financial Instruments (Detail)

v3.3.1.900
Fair Value Measurements - Estimated Fair Values of Financial Instruments (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Financial assets:    
Cash and due from banks $ 164,364 $ 158,320
Securities available for sale 698,296 1,060,717
Accrued interest receivable 9,501 9,749
FRB stock 14,098 12,273
Financial liabilities:    
Noninterest-bearing deposits 1,155,518 1,022,972
Interest-bearing deposits 2,354,458 2,533,774
Accrued interest payable 3,177 3,450
U.S. government agency securities [Member]    
Financial assets:    
Securities available for sale 47,822 128,207
Other securities [Member]    
Financial assets:    
Securities available for sale 22,753 22,893
Carrying Amount [Member]    
Financial assets:    
Cash and due from banks 164,364 158,320
Securities available for sale 698,296 1,060,717
Loans receivable, net of allowance for loan losses 3,140,381 2,735,832
Loans held for sale 2,874 5,451
Accrued interest receivable 9,501 9,749
Servicing assets   13,773
FHLB stock 16,385 17,580
FRB stock 14,098 12,273
Financial liabilities:    
Noninterest-bearing deposits 1,155,518 1,022,972
Interest-bearing deposits 2,354,458 2,533,774
Servicing liabilities   5,971
Borrowings 188,703 168,544
Accrued interest payable 3,177 3,450
Off-balance sheet items:    
Commitments to extend credit 262,680 309,584
Standby letters of credit 6,839 8,982
Carrying Amount [Member] | U.S. government agency securities [Member]    
Off-balance sheet items:    
Assets reclassified from Level 1 to Level 2   128,200
Carrying Amount [Member] | Other securities [Member]    
Off-balance sheet items:    
Assets reclassified from Level 2 to Level 1   22,900
Carrying Amount [Member] | Quoted Prices in Active Markets for Identical Assets [Member] | U.S. government agency securities [Member]    
Financial assets:    
Securities available for sale   128,400
Carrying Amount [Member] | Significant Observable Inputs with No Active Market with Identical Characteristics [Member] | U.S. government agency securities [Member]    
Financial assets:    
Securities available for sale   931,200
Fair Value [Member] | Quoted Prices in Active Markets for Identical Assets [Member]    
Financial assets:    
Cash and due from banks 164,364 158,320
Securities available for sale $ 22,913 23,056
Loans receivable, net of allowance for loan losses 0
Loans held for sale $ 0 0
Accrued interest receivable 9,501 9,749
Servicing assets   0
FHLB stock 0 0
FRB stock 0 0
Financial liabilities:    
Noninterest-bearing deposits 0 0
Interest-bearing deposits 0 0
Borrowings 0 0
Accrued interest payable 3,177 3,450
Off-balance sheet items:    
Commitments to extend credit 0 0
Standby letters of credit 0 0
Fair Value [Member] | Significant Observable Inputs with No Active Market with Identical Characteristics [Member]    
Financial assets:    
Cash and due from banks 0 0
Securities available for sale 675,383 1,036,538
Loans receivable, net of allowance for loan losses 0 0
Loans held for sale 2,874 5,451
Accrued interest receivable 0 0
Servicing assets   0
FHLB stock 16,385 17,580
FRB stock 14,098 12,273
Financial liabilities:    
Noninterest-bearing deposits 1,155,518 1,022,972
Interest-bearing deposits 0 0
Borrowings 0 0
Accrued interest payable 0 0
Off-balance sheet items:    
Commitments to extend credit 0 0
Standby letters of credit 0 0
Fair Value [Member] | Significant Unobservable Inputs [Member]    
Financial assets:    
Cash and due from banks 0 0
Securities available for sale 0 1,123
Loans receivable, net of allowance for loan losses 3,127,172 2,738,401
Loans held for sale 0 0
Accrued interest receivable 0 0
Servicing assets   13,773
FHLB stock 0 0
FRB stock 0 0
Financial liabilities:    
Noninterest-bearing deposits 0 0
Interest-bearing deposits 2,329,335 2,528,304
Servicing liabilities   5,971
Borrowings 188,703 168,544
Accrued interest payable 0 0
Off-balance sheet items:    
Commitments to extend credit 262,680 309,584
Standby letters of credit $ 6,839 $ 8,982