Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Consolidated Statements of Comprehensive Income
Net income	$ 17,954	$ 18,597	$ 51,078	$ 52,632
Other comprehensive income, net of tax:
Unrealized holding gains during the period, net of income tax expense of $1,985, $723, $7,358 and $11,657.	3,687	1,343	13,665	21,649
Reclassification adjustment for losses included in net income, net of income tax expense of ($951), ($1,712), ($1,689) and ($1,725).	(1,766)	(3,179)	(3,137)	(3,203)
Unrealized gains or (losses) on securities available for sale	1,921	(1,836)	10,528	18,446
Comprehensive income	$ 19,875	$ 16,761	$ 61,606	$ 71,078