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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 18,038	$ 8,326
Other comprehensive (loss) income, net of tax:
Net change in unrealized (loss) gain on investment securities	(17,301)	10,147
Defined benefit plans	184	516
Total other comprehensive (loss) income, net of tax	(17,117)	10,663
Comprehensive income	$ 921	$ 18,989

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