Defined Benefit Pension Plans - Fair Values of Plan Investments by Asset Category (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	$ 8,840	$ 8,662	$ 9,609
Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	0	857
Insurance Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	8,840	7,805
Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	0	857
Fair Value, Inputs, Level 1 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	0	857
Fair Value, Inputs, Level 1 [Member] | Insurance Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	0	0
Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	8,840	7,805
Fair Value, Inputs, Level 3 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	0	0
Fair Value, Inputs, Level 3 [Member] | Insurance Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	$ 8,840	$ 7,805	$ 8,534