Benefit Plans Level 3 Rollforward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Actual return on plan assets:
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss)	$ (32,262)	$ 80,307
Defined Benefit Plan, Plan Assets, Amount	1,121,784	1,093,784	$ 964,774
Real Asset Mutual Funds, Commodities | Fair Value, Inputs, Level 3 [Member]
Actual return on plan assets:
Defined Benefit Plan, Plan Assets, Amount	0	0
Fixed Income Mutual Funds, Insurance Contracts | Fair Value, Inputs, Level 3 [Member]
Actual return on plan assets:
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Actual Return (Loss) on Plan Assets Still Held	26	22
Defined Benefit Plan, Purchases, Total	70	99
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss)	(102)	186
Defined Benefit Plan, Plan Assets, Amount	$ 1,787	$ 1,793	$ 1,486