v2.4.0.6
Carrying Amounts and Estimated Fair Values of Financial Instruments (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Assets    
Cash and cash equivalents $ 81,950 $ 135,964
Interest-bearing deposits with Banks 250 250
Securities available-for-sale 302,544 322,512
Securities held-to-maturity 60,375 50,643
Federal Home Loan Bank stock 0  
Loans held for sale 19,314 8,920
Loans, net 1,149,104 1,112,788
Accrued interest receivable 4,428 4,887
Derivative assets 1,841 1,349
Financial liabilities    
Deposits (1,468,419) (1,501,293)
Short-term borrowings (22,142) (29,300)
Notes payable (44,780) (45,953)
Accrued interest payable (1,082) (1,582)
Standby letters of credit (208) (263)
Derivative liabilities (1,841)  
Derivatives 1,841 1,349
Carrying Value [Member]
   
Assets    
Cash and cash equivalents 81,950 135,964
Interest-bearing deposits with Banks 250 250
Securities available-for-sale 302,544 322,512
Securities held-to-maturity 58,314 48,975
Federal Home Loan Bank stock 5,099 5,099
Loans held for sale 19,314 8,920
Loans, net 1,142,489 1,111,666
Accrued interest receivable 4,428 4,887
Derivative assets 1,841 1,349
Financial liabilities    
Deposits (1,471,246) (1,498,821)
Short-term borrowings (22,142) (29,300)
Notes payable 48,721 (48,739)
Accrued interest payable (1,082) (1,582)
Standby letters of credit (208) (263)
Derivative liabilities (1,841)  
Derivatives   (1,349)
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
   
Assets    
Cash and cash equivalents 81,950 135,964
Financial liabilities    
Deposits (1,101,443) (1,092,434)
Notes payable (22,366)  
Significant Other Observable Inputs (Level 2) [Member]
   
Assets    
Cash and cash equivalents 0  
Interest-bearing deposits with Banks 250 250
Securities available-for-sale 301,484 321,452
Securities held-to-maturity 60,375 50,643
Loans held for sale 19,314 8,920
Loans, net   1,093,529
Accrued interest receivable 4,428 4,887
Derivative assets 1,841 1,349
Financial liabilities    
Deposits (366,976) (408,859)
Short-term borrowings (22,142) (29,300)
Notes payable (22,414) (27,477)
Accrued interest payable (1,082) (1,582)
Standby letters of credit (208) (263)
Derivative liabilities (1,841)  
Derivatives   (1,349)
Significant Unobservable Inputs (Level 3) [Member]
   
Assets    
Securities available-for-sale 1,060 1,060
Federal Home Loan Bank stock 0  
Loans, net 1,149,104 19,259
Financial liabilities    
Notes payable $ (22,366) $ (18,476)