Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Statement Of Income And Comprehensive Income [Abstract]
Net income		$ 11,354	$ 9,312
Other comprehensive (loss) income:
Unrealized income arising during the period on available-for-sale securities, net of income taxes impact, respectively		(5,230)	1
Change in defined benefit plans, net of income taxes impact, respectively	[1]	127	600
Reclassification adjustment for settlement gains and activity related to benefit plans, net of income taxes impact, respectively	[2]	(1)	(43)
Total other comprehensive (loss) income		(5,104)	558
Total comprehensive income		$ 6,250	$ 9,870

[1] The change in defined benefit plans consists primarily of unrecognized actuarial gains (losses) on defined benefit plans during the period.

[2] The reclassification adjustment for benefit plans includes settlement gains, amortization of prior service costs, and amortization of net gain or loss.  Amounts are included in other income on the Consolidated Statements of Income within total noninterest income.  Please reference Note 11 – Defined Benefit Plans, for more information.