CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
		Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income		$ 14,176	$ 9,521	$ 10,369	$ 23,697	$ 18,923
Other comprehensive income, net of tax:
Unrealized holding gains (losses) on securities arising during the period, net of income taxes (benefits)	[1]	6,336	1,013	947	7,349	2,512
Reclassification adjustment for net gain on sale of securities included in net income, net of income taxes	[2]	(1,368)	0	(308)	(1,368)	(744)
Other comprehensive income, net of tax		4,968	1,013	639	5,981	1,768
Comprehensive income, net of tax		$ 19,144	$ 10,534	$ 11,008	$ 29,678	$ 20,691

[1] Income tax (benefit) on the unrealized gains (losses) on securities was $4.3 million for the three months ended June 30, 2017, $714,000 for the three months ended March 31, 2017, $736,000 for the three months ended June 30, 2016, $5.0 million for the six months ended June 30, 2017 and $1.8 million for the six months ended June 30, 2016.

[2] Income tax (benefit) on the reclassification adjustment for net (gains) losses on sale of securities included in net income was $725,000 for the three months ended June 30, 2017, $0 for the three months ended March 31, 2017, $224,000 for the three months ended June 30, 2016, $725,000 for the six months ended June 30, 2017 and $541,000 for the six months ended June 30, 2016.