CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 54,024	$ 31,959	$ 25,257
Available for sale securities
Unrealized holding gains (losses)	(4,622)	2,800	2,500
Reclassification adjustment for gains (losses) realized in net income		(57)	62
Total unrealized gains(losses) on available for sale securities	(4,622)	2,743	2,562
Interest rate swaps designated as cash flow hedges
Unrealized holding gains (losses)	(959)	4,758	713
Reclassification adjustment for gains (losses) realized in net income	(1,864)	(1,354)	108
Total unrealized gains (losses) on interest rate swaps	(2,823)	3,404	821
Defined benefit retirement plans
Change in retirement liabilities	3,801	(1,232)	623
Other comprehensive income (loss)	(3,644)	4,915	4,006
Comprehensive income	$ 50,380	$ 36,874	$ 29,263