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
Net income	$ 15,825	$ 13,480	$ 45,703	$ 38,562
Change in securities available for sale:
Unrealized holding gain (loss) on securities available for sale arising during the period	56	(3,333)	4,127	8,369
Reclassification adjustment for (gains) losses included in net income	0	0	(52)	(52)
Net securities gain (loss) activity during the period	56	(3,333)	4,075	8,317
Tax effect	(13)	1,128	(1,357)	(2,564)
Net of tax amount	43	(2,205)	2,718	5,753
Defined benefit pension plans:
Amortization of net actuarial loss	66	53	199	161
Net gain activity during the period	66	53	199	161
Tax effect	(26)	(21)	(78)	(64)
Net of tax amount	40	32	121	97
Total other comprehensive income (loss), net of tax	83	(2,173)	2,839	5,850
Comprehensive income	$ 15,908	$ 11,307	$ 48,542	$ 44,412