Condensed Consolidated Statements of Comprehensive Income - 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	$ 11,955	$ 12,352	$ 24,346	$ 23,377
Other comprehensive income, net of tax:
Unrealized gains on investment securities arising during the period, net of income tax expense for three months of $921 and $986, and for six months of $1,268 and $3,290, respectively	1,502	1,588	2,070	5,299
Total other comprehensive income	1,502	1,588	2,070	5,299
Total comprehensive income	$ 13,457	$ 13,940	$ 26,416	$ 28,676