Estimated Fair Value of Financial Instruments - Additional Information (Details) (USD $) In Thousands, unless otherwise specified				3 Months Ended		9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Sep. 30, 2014 Collateral Dependent Loans [Member]	Sep. 30, 2013 Collateral Dependent Loans [Member]	Sep. 30, 2014 Collateral Dependent Loans [Member]	Sep. 30, 2013 Collateral Dependent Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans, principal balance				$ 2,036	$ 5,924	$ 2,036	$ 5,924
Impaired loans, valuation allowance	886	938	1,547	702	1,546	702	1,546
Impaired loans, reduction in loan losses				$ 69	$ 124	$ 162	$ 127