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
Consolidated Statements of Comprehensive Income
Net income	$ 21,105	$ 21,365	$ 33,124	$ 34,035
Other comprehensive income, net of tax:
Unrealized holding gains during the period, net of income tax expense of $2,542, $5,426, $5,373 and $10,934.	4,721	10,077	9,978	20,306
Reclassification adjustment for losses included in net income, net of income tax expense of ($199), ($126), ($738) and ($13).	(369)	(234)	(1,371)	(24)
Unrealized gains on securities available for sale	4,352	9,843	8,607	20,282
Comprehensive income	$ 25,457	$ 31,208	$ 41,731	$ 54,317