Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net unrealized gain (loss) on cashflow hedge	$ (2,160)	$ (3,714)	$ 803
Net unrealized gain (loss) on cashflow hedge, deferred taxes	(799)	(1,374)	297
Non-credit related other-than-temporary impairment on available for sale debt securities	0	0	37
Non-credit related other-than-temporary impairment on available for sale debt securities, deferred taxes	0	0	14
Net unrealized gain (loss) on available for sale debt securities	(1,852)	7,037	(8,527)
Net unrealized gain (loss) on available for sale debt securities, deferred taxes	(685)	2,604	(3,155)
Reclassification adjustment for net realized gains included in net income	$ 1,444	$ 213	$ 240