Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 14,688	$ 12,541	$ 30,714	$ 24,244
Unrealized gains on available-for-sale securities arising during the period	3,256	5,800	8,916	10,148
Reclassification adjustment for gains	0	(845)	(4,276)	(845)
Other comprehensive income before income taxes	3,256	4,955	4,640	9,303
Tax effect	(1,202)	(1,829)	(1,713)	(3,434)
Other comprehensive income, net of tax	2,054	3,126	2,927	5,869
Comprehensive Income, Net of Tax	$ 16,742	$ 15,667	$ 33,641	$ 30,113