Revision of Prior Financial Statements - Cash Flow Impact (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended		9 Months Ended	12 Months Ended
	Mar. 31, 2020	Sep. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019	Sep. 30, 2019	Dec. 31, 2019
Cash Flow Impact
Other current assets	$ 3,645	$ (4,036)	$ (4,442)	$ 1,715	$ (1,990)		$ 2,579
Other long-term assets		(3,286)	(3,286)	0	(3,286)		(4,417)
Net cash used in operating activities	(23,777)		(8,216)			$ (124)	(4,545)
Net cash used in operating activities				(29,216)	(6,344)
Proceeds from sale of business	3,281		152,217	9,844	152,217	155,498	155,498
Net cash used in investing activities	3,322		151,785			153,273	152,713
Net cash provided by investing activities				$ (16,424)	151,363
As previously reported
Cash Flow Impact
Other current assets	6,926	(14,974)	(18,661)		(16,209)		(8,359)
Other long-term assets		0	0		0		(1,131)
Net cash used in operating activities	(20,496)		(25,721)			(14,348)	(18,769)
Net cash used in operating activities					(23,849)
Proceeds from sale of business	0		169,722		169,722	169,722	169,722
Net cash used in investing activities	41		169,290			167,497	166,937
Net cash provided by investing activities					168,868
Revisions
Cash Flow Impact
Other current assets	(3,281)	10,938	14,219		14,219		10,938
Other long-term assets		$ (3,286)	(3,286)		(3,286)		(3,286)
Net cash used in operating activities	(3,281)		17,505			14,224	14,224
Net cash used in operating activities					17,505
Proceeds from sale of business	3,281		(17,505)		(17,505)	(14,224)	(14,224)
Net cash used in investing activities	$ 3,281		$ (17,505)			$ (14,224)	$ (14,224)
Net cash provided by investing activities					$ (17,505)