Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (816)
Other comprehensive income (loss), before reclassifications	(1,467)
Amounts reclassified from accumulated other comprehensive income (loss)	478
Net current-period other comprehensive income (loss)	(989)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(1,805)
Unrealized gains on available-for-sale securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax	244
Other comprehensive income (loss), before reclassifications	152
Amounts reclassified from accumulated other comprehensive income (loss)	(48)
Net current-period other comprehensive income (loss)	104
Accumulated Other Comprehensive Income (Loss), Net of Tax	348
Designated derivatives fair value adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(1,060)
Other comprehensive income (loss), before reclassifications	(1,619)
Amounts reclassified from accumulated other comprehensive income (loss)	526
Net current-period other comprehensive income (loss)	(1,093)
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (2,153)