UNAUDITED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 13,316	$ 13,499
Available for sale securities
Unrealized holding losses	(8,227)	(2,887)
Interest rate swaps designated as cash flow hedges
Unrealized holding losses	(1,226)	(322)
Less: reclassification adjustment for losses realized in net income	(441)	(454)
Total unrealized losses on interest rate swaps	(1,667)	(776)
Defined benefit retirement plans
Change in retirement liabilities		8
Other comprehensive loss	(9,894)	(3,655)
Comprehensive income	$ 3,422	$ 9,844

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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