Pension and Other Postretirement Benefits (Schedule of Total Expense for All Retirement Plans) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) plan	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Total retirement plan expense	$ 3,685	$ 2,824	$ 2,572
401(k) plan
Defined Benefit Plan Disclosure [Line Items]
Total retirement plan expense	3,196	2,403	2,031
Multiemployer and other defined benefit and pension plans
Defined Benefit Plan Disclosure [Line Items]
Total retirement plan expense	$ 78	70	195
Number of plans | plan	1
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Total retirement plan expense	$ 411	$ 351	$ 346