Derivative Instruments and Hedging Activities (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Interest rate swaps to hedge variable-rate debt outstanding:
Notional Amount	$ 7,500	$ 7,500
Pay fixed rate	2.72%	2.72%
Receive variable rate	0.24%	0.31%
Interest Rate Swaps
Interest rate swaps to hedge variable-rate debt outstanding:
Maturity	Sep. 15, 2017	Sep. 15, 2017
Unrealized gain (loss) fair value	$ (438)	$ (699)