Employee Benefits - Schedule of Reconciliation of Changes in Benefit Obligation and Fair value of Plan Assets As Well As the Funded Status Recognized in the Consolidated Statements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pension Benefits
Reconciliation of changes in benefit obligations
Benefit Obligation at Beginning of Year	$ 117,647	$ 110,637
Service Cost	0	0	$ 0
Interest Cost	2,924	3,627	4,401
Actuarial Losses (Gains)	(2,817)	10,364
Employer Benefits Paid	(7,169)	(6,981)
Benefit Obligation at End of Year	110,585	117,647	110,637
Reconciliation of changes in fair value of plan assets
Fair Value of Plan Assets at Beginning of Year	97,890	93,638
Actual Return on Plan Assets	10,103	10,764
Employer Contributions	470	469
Employer Benefits Paid	(7,169)	(6,981)
Fair Value of Plan Assets at End of Year	101,294	97,890	93,638
Funded Status at End of Year	(9,291)	(19,757)
Postretirement Benefits
Reconciliation of changes in benefit obligations
Benefit Obligation at Beginning of Year	31,507	27,571
Service Cost	678	578	455
Interest Cost	816	945	1,025
Actuarial Losses (Gains)	(2,514)	3,559
Employer Benefits Paid	(1,217)	(1,146)
Benefit Obligation at End of Year	29,270	31,507	$ 27,571
Reconciliation of changes in fair value of plan assets
Employer Contributions	1,217	1,146
Employer Benefits Paid	(1,217)	(1,146)
Funded Status at End of Year	$ (29,270)	$ (31,507)