Benefit Plan Schedule of Plan Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 263,473	$ 230,442	$ 210,623
Defined Benefit Plan, Service Cost	9,916	8,319	5,873
Defined Benefit Plan, Interest Cost	5,359	5,283	5,491
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(1,764)	(367)	(1,141)
Supplemental Executive Retirement Plan (SERP)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	1,345	1,680	816
Defined Benefit Plan, Interest Cost	510	403	484
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(1,855)	(2,083)	$ (1,300)
Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	226,673	195,089
Level 1 | Defined Benefit Plan, Cash
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	3,222	2,785
Level 1 | Defined Benefit Plan, Equity Securities, US
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	162,464	137,843
Level 1 | Obligations of U.S. Treasury and other U.S. Government sponsored entities
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Level 1 | Corporate Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Level 1 | Mutual Fund
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	60,987	54,461
Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	36,800	35,353
Level 2 | Defined Benefit Plan, Cash
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	4,731	4,837
Level 2 | Defined Benefit Plan, Equity Securities, US
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Level 2 | Obligations of U.S. Treasury and other U.S. Government sponsored entities
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	15,254	5,530
Level 2 | Corporate Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	16,815	24,986
Level 2 | Mutual Fund
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 0	$ 0