Employee Benefit Plans - Other Postretirement Fair value (Details) - Other Postretirement Benefits - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Total assets measured at fair value	$ 79,234	$ 76,640	$ 99,844
Cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Postretirement investments in collective and mutual funds, percentage		7.00%
Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Postretirement investments in insurance contracts, percentage	60.00%	69.00%
Postretirement investments in collective and mutual funds, percentage		29.00%
US, large cap companies
Defined Benefit Plan Disclosure [Line Items]
Postretirement investments in insurance contracts, percentage	16.00%	14.00%
Postretirement investments in collective and mutual funds, percentage		24.00%
International companies
Defined Benefit Plan Disclosure [Line Items]
Postretirement investments in collective and mutual funds, percentage		16.00%
U.S. Government securities
Defined Benefit Plan Disclosure [Line Items]
Postretirement investments in insurance contracts, percentage	15.00%	13.00%
Postretirement investments in collective and mutual funds, percentage		7.00%
US, small cap companies
Defined Benefit Plan Disclosure [Line Items]
Postretirement investments in insurance contracts, percentage	5.00%	4.00%
Other investments
Defined Benefit Plan Disclosure [Line Items]
Postretirement investments in insurance contracts, percentage	4.00%
Postretirement investments in collective and mutual funds, percentage		17.00%
Fair Value, Inputs, Level 1, Level 2, and Level 3 | Cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Total assets measured at fair value	$ 4,562	$ 4,213
Fair Value, Inputs, Level 1, Level 2, and Level 3 | U.S. companies
Defined Benefit Plan Disclosure [Line Items]
Total assets measured at fair value	2,369	2,583
Fair Value, Inputs, Level 1, Level 2, and Level 3 | Collective and mutual funds
Defined Benefit Plan Disclosure [Line Items]
Total assets measured at fair value		10
Fair Value, Inputs, Level 1, Level 2, and Level 3 | Insurance contract
Defined Benefit Plan Disclosure [Line Items]
Total assets measured at fair value	72,303	69,834
Quoted Prices in Active Markets for Identical Assets  (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total assets measured at fair value	2,369	2,588
Quoted Prices in Active Markets for Identical Assets  (Level 1) | Cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Total assets measured at fair value	0	0
Quoted Prices in Active Markets for Identical Assets  (Level 1) | U.S. companies
Defined Benefit Plan Disclosure [Line Items]
Total assets measured at fair value	2,369	2,583
Quoted Prices in Active Markets for Identical Assets  (Level 1) | Collective and mutual funds
Defined Benefit Plan Disclosure [Line Items]
Total assets measured at fair value		5
Quoted Prices in Active Markets for Identical Assets  (Level 1) | Insurance contract
Defined Benefit Plan Disclosure [Line Items]
Total assets measured at fair value	0	0
Significant Other Observable Inputs  (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total assets measured at fair value	76,865	74,052
Significant Other Observable Inputs  (Level 2) | Cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Total assets measured at fair value	4,562	4,213
Significant Other Observable Inputs  (Level 2) | U.S. companies
Defined Benefit Plan Disclosure [Line Items]
Total assets measured at fair value	0	0
Significant Other Observable Inputs  (Level 2) | Collective and mutual funds
Defined Benefit Plan Disclosure [Line Items]
Total assets measured at fair value		5
Significant Other Observable Inputs  (Level 2) | Insurance contract
Defined Benefit Plan Disclosure [Line Items]
Total assets measured at fair value	72,303	69,834
Significant Unobservable Inputs  (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Total assets measured at fair value	0	0
Significant Unobservable Inputs  (Level 3) | Cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Total assets measured at fair value	0	0
Significant Unobservable Inputs  (Level 3) | U.S. companies
Defined Benefit Plan Disclosure [Line Items]
Total assets measured at fair value	0	0
Significant Unobservable Inputs  (Level 3) | Collective and mutual funds
Defined Benefit Plan Disclosure [Line Items]
Total assets measured at fair value		0
Significant Unobservable Inputs  (Level 3) | Insurance contract
Defined Benefit Plan Disclosure [Line Items]
Total assets measured at fair value	$ 0	$ 0