Derivative Instruments and Hedging Activities (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, maturity date	Dec. 31, 2036
Derivative, description of variable rate basis	three month LIBOR
Derivative, basis spread on variable rate (in hundredths)	1.70%
Derivative, type of interest rate paid on swap	fixed rate
Derivative, fixed interest rate (in hundredths)	4.91%
Interest expense on interest rate swap	$ 30	$ 30
Interest Rate Swaps II [Member]
Derivative [Line Items]
Derivative, description of variable rate basis	one-month LIBOR
Interest expense on interest rate swap	32	26
Cash Collateral for Swaps	$ 1,000
Number of derivative instruments entered into	4
Number of commercial loans related to interest rate swaps	4