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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 21,713	$ 20,142	$ 43,395	$ 38,478
Change in securities available for sale:
Unrealized holding gain/(loss) on securities available-for-sale arising during the period	8,893	(2,242)	19,853	(11,402)
Reclassification adjustment for (gains)/losses included in net income	(65)	0	(88)	6
Net securities gain/(loss) activity during the period	8,828	(2,242)	19,765	(11,396)
Tax effect	(1,853)	471	(4,151)	2,499
Net of tax amount	6,975	(1,771)	15,614	(8,897)
Defined benefit pension plans:
Amortization of net actuarial loss	53	67	103	133
Net gain on activity during the period	53	67	103	133
Tax effect	(15)	(18)	(26)	(35)
Net of tax amount	38	49	77	98
Total other comprehensive income, net of tax	7,013	(1,722)	15,691	(8,799)
Comprehensive income	$ 28,726	$ 18,420	$ 59,086	$ 29,679

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