Employee Benefit Plans (Change on Benefit Obligations and Plan Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Change in benefit obligation:
Benefit Obligation, beginning of year	$ 42,291	$ 24,511
Service Cost	5,493	4,351	$ 5,153
Interest Cost	1,469	1,340	862
Plan Amendment	0	6,569
Actuarial Loss	4,005	5,981
Benefits Paid	(748)	(461)
Benefit Obligation, end of year	52,510	42,291	24,511
Change in plan assets:
Fair Value of Plan Assets, beginning of year	24,051	15,716
Actual Return on Plan Assets	4,123	4,025
Employer Contributions	4,617	4,771
Benefits Paid	(748)	(461)
Fair Value of Plan assets, end of year	32,043	24,051	$ 15,716
Funded Status at end of period	(20,467)	(18,240)
Amounts recognized in the Consolidated Balance Sheet:
Non-current assets	0	0
Current liabilities	0	0
Non-current Liabilities	(20,467)	(18,240)
Net Liability at end of year	(20,467)	(18,240)
Amounts recognized in accumulated other comprehensive loss:
Prior Service Cost	5,676	6,163
Net actuarial loss	3,689	2,268
Amounts recognized in accumulated other comprehensive loss:	$ 9,365	$ 8,431