Pension Benefits, Other Postretirement Benefits and Employee Savings and Investment Plans (Assets Carried at Fair Value by Level) (Details) - Pension Benefits - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Pension assets	$ 33,462	$ 35,296	$ 42,835
Level 1
Defined Benefit Plan Disclosure [Line Items]
Pension assets	3,400	3,535
Level 2
Defined Benefit Plan Disclosure [Line Items]
Pension assets	28,772	30,414
Level 3
Defined Benefit Plan Disclosure [Line Items]
Pension assets	1,290	1,347
Fixed income bonds
Defined Benefit Plan Disclosure [Line Items]
Pension assets	28,392	29,896
Fixed income bonds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Pension assets	0	0
Fixed income bonds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Pension assets	28,392	29,896
Fixed income bonds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Pension assets	0	0
Mutual funds
Defined Benefit Plan Disclosure [Line Items]
Pension assets	3,400	3,535
Mutual funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Pension assets	3,400	3,535
Mutual funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Pension assets	0	0
Mutual funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Pension assets	0	0
Pooled separate accounts
Defined Benefit Plan Disclosure [Line Items]
Pension assets	380	518
Pooled separate accounts | Level 1
Defined Benefit Plan Disclosure [Line Items]
Pension assets	0	0
Pooled separate accounts | Level 2
Defined Benefit Plan Disclosure [Line Items]
Pension assets	380	518
Pooled separate accounts | Level 3
Defined Benefit Plan Disclosure [Line Items]
Pension assets	0	0
Guaranteed deposit account
Defined Benefit Plan Disclosure [Line Items]
Pension assets	1,290	1,347
Guaranteed deposit account | Level 1
Defined Benefit Plan Disclosure [Line Items]
Pension assets	0	0
Guaranteed deposit account | Level 2
Defined Benefit Plan Disclosure [Line Items]
Pension assets	0	0
Guaranteed deposit account | Level 3
Defined Benefit Plan Disclosure [Line Items]
Pension assets	$ 1,290	$ 1,347