Derivative Instruments and Hedging Activities (Details 2) (Offsetting fixed interest rate swaps [Member], USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Offsetting fixed interest rate swaps [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount:	$ 13,816	$ 14,323
Pay fixed rate (average)	2.00%	2.00%
Receive variable rate (average)	0.16%	0.17%
Maturity, Lower maturity range	2015-03-31	2015-03-31
Maturity, Higher maturity range	2021-10-31	2021-10-31
Derivative, Remaining Maturity	2 years 2 months 12 days	2 years 10 months 24 days
Unrealized gain (loss) fair value	$ (193)	$ (276)