Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement [Abstract]
Securities transactions accumulated other comprehensive income reclassifications	$ 0	$ 0	$ 3,912	$ 88
Unrealized gains (losses) on securities, tax	(91)	210	(507)	(811)
Reclassification adjustment for gains included in net income, tax	0	0	1,513	34
Other comprehensive gain (loss), tax	$ (91)	$ 210	$ 1,006	$ (777)