CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 22,776	$ 21,454	$ 59,745	$ 64,849
Change in securities available-for-sale:
Unrealized holding gain on securities available-for-sale arising during the period	789	4,979	16,848	24,832
Reclassification adjustment for net gains included in net income	(314)	(6)	(363)	(94)
Net securities gain activity during the period	475	4,973	16,485	24,738
Tax effect	(101)	(1,044)	(3,462)	(5,196)
Net of tax amount	374	3,929	13,023	19,542
Defined benefit pension plans:
Amortization of net actuarial loss	63	51	189	154
Net gain activity during the period	63	51	189	154
Tax effect	(15)	(13)	(47)	(38)
Net of tax amount	48	38	142	116
Total other comprehensive income, net of tax	422	3,967	13,165	19,658
Comprehensive income	$ 23,198	$ 25,421	$ 72,910	$ 84,507