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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net income	$ 7,281	$ 7,812
Other comprehensive income (loss), before tax:
Changes in unrealized loss on securities available-for-sale	8,900	(10,702)
Changes in unrealized loss on cash flow hedging derivatives	(845)
Changes in unrealized loss on cash flow hedging derivatives		654
Changes in unrealized loss on pension	0	41
Income taxes related to other comprehensive income:
Changes in unrealized loss on securities available-for-sale	(2,079)	2,550
Changes in unrealized loss on cash flow hedging derivatives	(198)
Changes in unrealized loss on cash flow hedging derivatives		(155)
Changes in unrealized loss on pension	0	(10)
Total other comprehensive income (loss)	6,174	(7,622)
Total comprehensive income	13,455	190
Net unrealized gain (loss) on AFS securities
Income taxes related to other comprehensive income:
Total other comprehensive income (loss)	6,821	(8,152)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Income taxes related to other comprehensive income:
Total other comprehensive income (loss)	(647)	499
Net unrealized loss on post-retirement plans
Income taxes related to other comprehensive income:
Total other comprehensive income (loss)	$ 0	$ 31

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