Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Accumulated other comprehensive income (loss), Beginning Balance	$ 708	$ (1,689)
Other comprehensive (loss) income	(1,482)	1,661
Reclassification of (gains) losses recognized	234	(166)
Accumulated other comprehensive income (loss), Ending Balance	(540)	(194)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated other comprehensive income (loss), Beginning Balance	1,894	1,370
Other comprehensive (loss) income	(1,889)	910
Reclassification of (gains) losses recognized	(545)	(166)
Accumulated other comprehensive income (loss), Ending Balance	(540)	2,114
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated other comprehensive income (loss), Beginning Balance	(1,186)	(3,059)
Other comprehensive (loss) income	407	751
Reclassification of (gains) losses recognized	779	0
Accumulated other comprehensive income (loss), Ending Balance	$ 0	$ (2,308)