CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 6,646	$ 5,711	$ 19,971	$ 14,029
Other comprehensive income (loss):
Net unrealized gains (losses)	(4,348)	(692)	(12,715)	9,919
Tax effect	(1,139)	(176)	(3,246)	2,530
Net of tax amount	(3,209)	(516)	(9,469)	7,389
Change in funded status of defined benefit pension plan and other benefit plans:
Reclassification adjustment for amortization of prior service costs	(55)	(55)	(165)	(165)
Reclassification adjustment for amortization of net actuarial loss	57	77	169	231
Total before tax effect	2	22	4	66
Tax effect	1	6	2	14
Net of tax amount	1	16	2	52
Total other comprehensive income (loss)	(3,208)	(500)	(9,467)	7,441
Comprehensive income	$ 3,438	$ 5,211	$ 10,504	$ 21,470