Condensed Consolidated Statements of Shareholders' Equity (Deficit) (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock [Member]	Non-controlling Interest [Member]	Total
Balance at Dec. 31, 2018		$ 1,048,900	$ (1,022,900)	$ (20,700)	$ (24,700)		$ (19,400)
Balance, shares at Dec. 31, 2018	28,097				2,402
Net income loss			9,000				9,000
Pension adjustments, net of tax				100			100
Balance at Jun. 30, 2019		1,048,900	(1,013,900)	20,600	$ (24,700)		(10,300)
Balance, shares at Jun. 30, 2019	28,097				2,402
Balance at Dec. 31, 2019		1,053,900	(1,002,700)	(20,600)	$ (24,900)	25,600	31,300
Balance, shares at Dec. 31, 2019	28,097				2,927
Net income loss			(14,300)			(700)	(15,000)
Pension adjustments, net of tax				$ 20,600			20,600
Balance at Jun. 30, 2020		$ 1,053,900	$ (1,017,000)		$ (24,900)	$ 24,900	$ 36,900
Balance, shares at Jun. 30, 2020	28,097				2,927