Condensed Consolidated Statements of Stockholders’ Deficit - USD ($) $ in Thousands	Common Stock	Preferred Stock	Treasury Stock	Additional Paid in Capital.	Equity-Based Compensation	Foreign Currency Translation Adjustment	Unrealized Pension Actuarial Losses, net of tax	Accumulated Deficit	Total
Beginning balance at Dec. 31, 2018	$ 15	$ 1	$ (10,342)	$ 445,452	$ 41,731	$ (6,423)	$ (9,301)	$ (702,391)	$ (241,258)
Beginning balance (in shares) at Dec. 31, 2018	150,142,955	4,569,233	2,549,185
Increase (Decrease) in Stockholders’ Equity (Deficit)
Net loss								(32,172)	(32,172)
Equity-based compensation					2,798				2,798
Foreign currency translation adjustment						3,392			3,392
Net realized pension actuarial gains, net of tax							(224)		(224)
Ending balance at Mar. 31, 2019	$ 15	$ 1	$ (10,342)	445,452	44,529	(3,031)	(9,525)	(734,563)	(267,464)
Ending balance (in shares) at Mar. 31, 2019	150,142,955	4,569,233	2,549,185
Beginning balance at Dec. 31, 2018	$ 15	$ 1	$ (10,342)	445,452	41,731	(6,423)	(9,301)	(702,391)	(241,258)
Beginning balance (in shares) at Dec. 31, 2018	150,142,955	4,569,233	2,549,185
Increase (Decrease) in Stockholders’ Equity (Deficit)
Net loss									(509,100)
Ending balance at Dec. 31, 2019	$ 15	$ 1	$ (10,949)	445,452	49,336	(7,329)	(8,059)	(1,211,508)	(743,041)
Ending balance (in shares) at Dec. 31, 2019	150,851,689	4,294,233	2,787,147
Increase (Decrease) in Stockholders’ Equity (Deficit)
Net loss								(12,670)	(12,670)
Equity-based compensation					861				861
Foreign currency translation adjustment						920			920
Net realized pension actuarial gains, net of tax							504		$ 504
Preferred shares converted to common (in shares)	1,227,714	(1,004,183)
Shares returned in connection with the Appraisal Action as result of repayment of Margin Loan (in shares)	(4,570,734)		4,570,734						4,570,734
Shares repurchased (in shares)									(2,787,147)
Ending balance at Mar. 31, 2020	$ 15	$ 1	$ (10,949)	$ 445,452	$ 50,197	$ (6,409)	$ (7,555)	$ (1,224,178)	$ (753,426)
Ending balance (in shares) at Mar. 31, 2020	147,508,669	3,290,050	7,357,881