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
Net income	$ 15,364	$ 12,803	$ 29,878	$ 25,082
Change in securities available for sale:
Unrealized holding gain on securities available for sale arising during the period	3,358	4,155	4,070	11,702
Reclassification adjustment for gains included in net income	(49)	0	(52)	(52)
Net securities gain activity during the period	3,309	4,155	4,018	11,650
Tax effect	(1,079)	(1,385)	(1,343)	(3,691)
Net of tax amount	2,230	2,770	2,675	7,959
Defined benefit pension plans:
Amortization of net actuarial loss	67	54	133	108
Tax effect	(26)	(21)	(52)	(43)
Net of tax amount	41	33	81	65
Total other comprehensive income, net of tax	2,271	2,803	2,756	8,024
Comprehensive income	$ 17,635	$ 15,606	$ 32,634	$ 33,106