Benefit Plans - Accumulated Other Comprehensive loss (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pension Plan
Amounts within accumulated other comprehensive loss that had not yet been recognized as components of net periodic benefit cost
Net actuarial loss (gain)	$ 36,357	$ 44,351
Total, pretax effect	36,357	44,351
Tax impact	(9,698)	(11,831)
Ending balance in accumulated other comprehensive loss	26,659	32,520
Other Benefits
Amounts within accumulated other comprehensive loss that had not yet been recognized as components of net periodic benefit cost
Net actuarial loss (gain)	(3,094)	(1,068)	$ (1,582)
Total, pretax effect	(3,094)	(1,068)
Tax impact	825	285
Ending balance in accumulated other comprehensive loss	$ (2,269)	$ (783)