Post Retirement Benefits (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Pension, health and life insurance expense:
Multi-employer plan	$ 207	$ 189
Defined contribution plan	365	302
Total pension expense	572	491
Interest cost	50	41
Amortization of prior service credits	(124)	(124)
Amortization of net loss	43	43
Net periodic benefit credit	(31)	(40)
Total post-retirement benefits expense	541	$ 451
Pension Plan
Pension, health and life insurance expense:
Payments made to pension plans	526
Pension plan payments expected to be made in fiscal year	2,179
Pension plan payments accrued	1,126
Other Postretirement Benefits Plan
Pension, health and life insurance expense:
Payments for post retirement healthcare and life insurance	31
Pension plan payments expected to be made in fiscal year	1,360
Pension plan payments accrued	$ 1,360