CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net income	$ 20,142	$ 15,364	$ 38,478	$ 29,878
Change in securities available for sale:
Unrealized holding gain (loss) on securities available for sale arising during the period	(2,242)	3,358	(11,402)	4,070
Reclassification adjustment for gains included in net income	0	(49)	6	(52)
Net securities gain (loss) activity during the period	(2,242)	3,309	(11,396)	4,018
Tax effect	471	(1,079)	2,499	(1,343)
Net of tax amount	(1,771)	2,230	(8,897)	2,675
Defined benefit pension plans:
Amortization of net actuarial loss	67	67	133	133
Tax effect	(18)	(26)	(35)	(52)
Net of tax amount	49	41	98	81
Total other comprehensive income (loss), net of tax	(1,722)	2,271	(8,799)	2,756
Comprehensive income	$ 18,420	$ 17,635	$ 29,679	$ 32,634