Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 13,932	$ 13,232	$ 44,646	$ 37,476
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Reclassification Adjustments and Tax	488	1,427	9,404	11,575
Reclassification adjustment for gains	0	(2,668)	(4,276)	(3,513)
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax	488	(1,241)	5,128	8,062
Tax effect	(180)	458	(1,893)	(2,976)
Other comprehensive income, net of tax	308	(783)	3,235	5,086
Comprehensive Income, Net of Tax	$ 14,240	$ 12,449	$ 47,881	$ 42,562