CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 21,454	$ 20,570	$ 64,849	$ 59,048
Change in securities available for sale:
Unrealized holding gain (loss) on securities available-for-sale arising during the period	4,979	(4,576)	24,832	(15,978)
Reclassification adjustment for (gains) losses included in net income	(6)	0	(94)	6
Net securities gain (loss) activity during the period	4,973	(4,576)	24,738	(15,972)
Tax effect	(1,044)	960	(5,196)	3,459
Net of tax amount	3,929	(3,616)	19,542	(12,513)
Defined benefit pension plans:
Amortization of net actuarial loss	51	67	154	200
Net gain activity during the period	51	67	154	200
Tax effect	(13)	(17)	(38)	(52)
Net of tax amount	38	50	116	148
Total other comprehensive income (loss), net of tax	3,967	(3,566)	19,658	(12,365)
Comprehensive income	$ 25,421	$ 17,004	$ 84,507	$ 46,683