Benefit Plans - Change in Net Actuarial Loss (Gain) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Benefit Plans
Percentage of greater of projected benefit obligation or fair value of plan assets for amortization of actuarial gains or losses	5.00%
Amortization period for actuarial gains and losses that exceed threshold	5 years
Pension Plan
Change in net actuarial loss (gain) and amortization
Net actuarial loss (gain) at beginning of year	$ 36,357
Amortization cost	(5,643)	$ (6,961)	$ (5,806)
Liability gain	(38,949)	(4,614)	14,935
Asset loss	24,047	3,581	(4,839)
Net actuarial loss (gain) at end of year	15,812	36,357
Pension Benefits
Change in net actuarial loss (gain) and amortization
Net actuarial loss (gain) at beginning of year	36,357	44,351
Amortization cost	(5,643)	(6,961)
Liability gain	(38,949)	(4,614)
Asset loss	24,047	3,581
Net actuarial loss (gain) at end of year	15,812	36,357	44,351
Other Benefits
Change in net actuarial loss (gain) and amortization
Net actuarial loss (gain) at beginning of year	(3,094)	(1,068)
Amortization cost	497	48	211
Liability gain	(5,808)	(2,074)	303
Net actuarial loss (gain) at end of year	$ (8,405)	$ (3,094)	$ (1,068)