CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income		$ 9,521	$ 11,953	$ 8,554
Other comprehensive income, net of tax:
Unrealized holding gains (losses) on securities arising during the period, net of income taxes (benefits)	[1]	1,013	(4,084)	1,565
Reclassification adjustment for net gain on sale of securities included in net income, net of income taxes	[2]	0	0	(436)
Net unrealized gain on securities, net of income taxes		1,013	(4,084)	1,129
Comprehensive income		$ 10,534	$ 7,869	$ 9,683

[1] Income tax (benefit) on the unrealized gains (losses) on securities was $714,000 for the three months ended March 31, 2017, $(2.9) million for the three months ended December 31, 2016 and $1.1 million for the three months ended March 31, 2016.

[2] Income tax (benefit) on the reclassification adjustment for net (gains) losses on sale of securities included in net income was $0 for the three months ended March 31, 2017, $0 for the three months ended December 31, 2016 and $317,000 for the three months ended March 31, 2016.