Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ 25,415	$ 3,853	$ (5,125)
Net change in unrealized gains (losses) on securities :
Unrealized gain (losses)	(1,971)	147	395
Income tax effect	380	(32)	(84)
Unrealized gain (losses) on securities, net	(1,591)	115	311
Pension benefit liability adjustment:
Net gain during the period			9,930
Income tax effect			(2,086)
Pension liability adjustment, net of tax			7,844
Total other comprehensive income (loss), net of tax	(1,591)	115	8,155
Total comprehensive income	$ 23,824	$ 3,968	$ 3,030