Loans (Categories of Loans) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 978,113		$ 990,569
Undisbursed loans in process	(6,291)		(7,418)
Unamortized deferred loan costs, net	2,431		2,432
Allowance for loan losses	(15,701)	(15,991)	(16,038)	(16,003)	(16,634)	(16,815)
Net loans	958,552		969,545
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	286,865		288,848
Allowance for loan losses	(9,633)	(9,873)	(9,908)	(10,004)	(10,244)	(10,602)
Commercial [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	197,675		203,613
Commercial [Member] | Construction and Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	15,115		17,462
Commercial [Member] | Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	74,075		67,773
Residential Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	490,415		502,619
Allowance for loan losses	(3,662)	(3,534)	(3,394)	(3,392)	(3,471)	(3,444)
Residential Mortgage [Member] | One- to Four- Family [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	490,415		502,619
Consumer Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	200,833		199,102
Allowance for loan losses	(2,406)	(2,584)	(2,736)	(2,607)	(2,919)	(2,769)
Consumer Loans [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	102,025		100,516
Consumer Loans [Member] | Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	5,972		6,598
Consumer Loans [Member] | Auto [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	15,277		15,572
Consumer Loans [Member] | Boat/RV [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 77,559		$ 76,416