Pensions and Other Postretirement Benefit Plans (Schedule of Fair Value of Plan Assets) (Details) - Pension plans - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 74,929	$ 225,327	$ 239,051
Fair Value, Recurring
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	74,929	225,327
Fair Value, Inputs, Level 1 | Fair Value, Recurring
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	548	724
Fair Value, Inputs, Level 2 | Fair Value, Recurring
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,003	98,252
Fair Value, Inputs, Level 3 | Fair Value, Recurring
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,418	3,861
Fair Value, Inputs, Level 1, 2 and 3 | Fair Value, Recurring
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3,969	102,837
Common Stocks and equity funds | Fair Value, Inputs, Level 1 | Fair Value, Recurring
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Common Stocks and equity funds | Fair Value, Inputs, Level 2 | Fair Value, Recurring
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Common Stocks and equity funds | Fair Value, Inputs, Level 3 | Fair Value, Recurring
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Common Stocks and equity funds | Fair Value, Inputs, Level 1, 2 and 3 | Fair Value, Recurring
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Common Stocks and equity funds | Fair Value Measured at Net Asset Value Per Share | Fair Value, Recurring
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	13,069	18,963
Debt securities | Fair Value, Inputs, Level 1 | Fair Value, Recurring
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Debt securities | Fair Value, Inputs, Level 2 | Fair Value, Recurring
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,003	98,252
Debt securities | Fair Value, Inputs, Level 3 | Fair Value, Recurring
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Debt securities | Fair Value, Inputs, Level 1, 2 and 3 | Fair Value, Recurring
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,003	98,252
Insurance contracts | Fair Value, Inputs, Level 1 | Fair Value, Recurring
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Insurance contracts | Fair Value, Inputs, Level 2 | Fair Value, Recurring
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Insurance contracts | Fair Value, Inputs, Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,418	3,861	$ 3,819
Insurance contracts | Fair Value, Inputs, Level 3 | Fair Value, Recurring
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,418	3,861
Insurance contracts | Fair Value, Inputs, Level 1, 2 and 3 | Fair Value, Recurring
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,418	3,861
Cash and short-term investments | Fair Value, Inputs, Level 1 | Fair Value, Recurring
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	548	724
Cash and short-term investments | Fair Value, Inputs, Level 2 | Fair Value, Recurring
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Cash and short-term investments | Fair Value, Inputs, Level 3 | Fair Value, Recurring
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Cash and short-term investments | Fair Value, Inputs, Level 1, 2 and 3 | Fair Value, Recurring
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	548	724
Fixed income funds | Fair Value Measured at Net Asset Value Per Share | Fair Value, Recurring
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	57,891	101,843
Limited partnerships | Fair Value Measured at Net Asset Value Per Share | Fair Value, Recurring
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 0	$ 1,684