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 |