Basis of Financial Statement Presentation - Revisions for Errors (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Reclassification [Line Items]
Pension liability adjustment, net of tax	$ 0	$ 19,159	$ 331	$ 19,374
Comprehensive (loss) income	$ (1,396)	13,319	$ (66,997)	16,622
As reported
Reclassification [Line Items]
Pension liability adjustment, net of tax		143		358
Comprehensive (loss) income		$ (5,697)		$ (2,394)