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Pension and Other Postretirement Benefit Plans - Assets that are Carried at Fair Value, and the Method Used to Determine Fair Value (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Long Corporate Bond Fund [Member]
Pooled Separate Accounts
Average duration of bonds	3 months
Retirement Plan [Member]
Pooled Separate Accounts
Plan Investments	$ 19,220	$ 19,065	$ 26,059
Retirement Plan [Member] \| Long Duration Bond Fund [Member]
Pooled Separate Accounts
Plan Investments	4,842	4,596
Retirement Plan [Member] \| Long Corporate Bond Fund [Member]
Pooled Separate Accounts
Plan Investments	3,907	3,754
Retirement Plan [Member] \| Prudential Short-term [Member]
Pooled Separate Accounts
Plan Investments	363	262
Retirement Plan [Member] \| Investment Grade Bond Fund [Member]
Pooled Separate Accounts
Plan Investments	$ 10,108	$ 10,453

Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

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