Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Consolidated Statements of Comprehensive Income (Unaudited) [Abstract]
Net income	$ 17,089	$ 14,083
Net unrealized holding loss on securities available for sale	(19,225)	(6,018)
Tax effect	4,974	1,557
Net unrealized loss on securities available for sale, net of tax	(14,251)	(4,461)
Amortization of net actuarial gain	(78)	(228)
Amortization of prior service credit	(280)	(52)
Tax effect	93	73
Amortization of net actuarial gain and prior service credit on pension and postretirement plans, net of tax	(265)	(207)
Other comprehensive income (loss), net of tax	(14,516)	(4,668)
Comprehensive income	$ 2,573	$ 9,415