Accumulated Other Comprehensive Income (Loss) - Schedule of Amounts Reclassified out of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of actuarial losses	$ (2,398)	$ 0
Total before tax	25,534	28,256
Tax impact	(7,635)	(9,439)
Total after tax	18,032	18,954
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	2,398	0
Tax impact	(776)	0
Total after tax	1,623	0
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of actuarial losses	$ 2,398	$ 0