Annual report pursuant to Section 13 and 15(d)

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

v3.6.0.2
Fair Value Measurements - Estimated Fair Values of Financial Instruments (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Financial assets:    
Cash and due from banks $ 147,235 $ 164,364
Securities available for sale 516,964 698,296
Accrued interest receivable 10,987 9,501
FRB stock 0 14,098
Financial liabilities:    
Noninterest-bearing deposits 1,203,240 1,155,518
Interest-bearing deposits 2,606,497 2,354,458
Accrued interest payable 2,567 3,177
U.S. government agency securities [Member]    
Financial assets:    
Securities available for sale 7,441 47,822
Other securities [Member]    
Financial assets:    
Securities available for sale 22,394 22,753
Carrying Amount [Member]    
Financial assets:    
Cash and due from banks 147,235 164,364
Securities available for sale 516,964 698,296
Loans and leases receivable, net of allowance for loan and lease losses 3,812,340 3,140,381
Loans held for sale 9,316 2,874
Accrued interest receivable 10,987 9,501
FHLB stock 16,385 16,385
FRB stock   14,098
Financial liabilities:    
Noninterest-bearing deposits 1,203,240 1,155,518
Interest-bearing deposits 2,606,497 2,354,458
Borrowings 333,978 188,703
Accrued interest payable 2,567 3,177
Off-balance sheet items:    
Commitments to extend credit 310,987 262,680
Standby letters of credit 15,669 6,839
Fair Value [Member] | Quoted Prices in Active Markets for Identical Assets [Member]    
Financial assets:    
Cash and due from banks 147,235 164,364
Securities available for sale 22,550 22,913
Loans and leases receivable, net of allowance for loan and lease losses 0
Loans held for sale 0 0
Accrued interest receivable 10,987 9,501
FHLB stock 0 0
FRB stock   0
Financial liabilities:    
Noninterest-bearing deposits 0 0
Interest-bearing deposits 0 0
Borrowings 0 0
Accrued interest payable 2,567 3,177
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 494,414 675,383
Loans and leases receivable, net of allowance for loan and lease losses 0 0
Loans held for sale 9,316 2,874
Accrued interest receivable 0 0
FHLB stock 16,385 16,385
FRB stock   14,098
Financial liabilities:    
Noninterest-bearing deposits 1,203,240 1,155,518
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 0
Loans and leases receivable, net of allowance for loan and lease losses 3,789,579 3,127,172
Loans held for sale 0 0
Accrued interest receivable 0 0
FHLB stock 0 0
FRB stock   0
Financial liabilities:    
Noninterest-bearing deposits 0 0
Interest-bearing deposits 2,541,929 2,329,335
Borrowings 333,978 188,703
Accrued interest payable 0 0
Off-balance sheet items:    
Commitments to extend credit 310,987 262,680
Standby letters of credit $ 15,669 $ 6,839