Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Income Loss [Line Items]
Tax effect	$ 832	$ 276
Net-of-tax amount	(1,343)	(448)
Unrealized gains on available-for-sale securities [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated Other Comprehensive Income (Loss), before Tax	2,510	2,072
Net unrealized (loss) gain on derivatives used for cash flow hedges [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated Other Comprehensive Income (Loss), before Tax	$ (4,685)	$ (2,796)