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, 2017	$ 100	$ 1,050,800	$ (1,027,500)	$ (18,900)	$ (26,600)	$ (4,700)	$ (26,800)
Balance, shares at Dec. 31, 2017	28,097				3,169
Net income							3,900
Net loss			3,900			4,700	8,600
Purchase of treasury stock					$ 0		0
Purchase of treasury stock, shares					69
Pension adjustments, net of tax				300			300
Restricted stock grants and other		(1,900)			$ 1,900
Restricted stock grants and other, shares					(487)
Net change in cumulative translation adjustment				700			700
ASC 606 Adjustment			300				300
Reclassification adjustment			100				100
Balance at Sep. 30, 2018	$ 100	1,048,900	(1,023,200)	(17,900)	$ (24,700)		(16,800)
Balance, shares at Sep. 30, 2018	28,097				2,751
Balance at Dec. 31, 2018	$ 100	1,048,900	(1,022,900)	(20,700)	$ (24,700)		(19,200)
Balance, shares at Dec. 31, 2018	28,097				2,402
Net income			8,300				8,300
Purchase of treasury stock					$ 0		$ 0
Purchase of treasury stock, shares					450		450
Pension adjustments, net of tax				100			$ 100
Restricted stock grants and other		200			$ (200)		0
Restricted stock grants and other, shares					75
Rounding		100					100
Balance at Sep. 30, 2019	$ 100	$ 1,049,200	$ (1,014,600)	$ (20,600)	$ (24,900)		$ (10,800)
Balance, shares at Sep. 30, 2019	28,097				2,927