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)			8,300				8,300
Pension adjustments, net of tax				100			100
Purchase of treasury stock					$ (0)		0
Purchase of treasury stock, shares					450
Restricted stock grants and other		200			$ (200)
Restricted stock grants and other, shares					75
Balance at Sep. 30, 2019		1,049,100	(1,014,600)	(20,600)	$ (24,900)		(11,000)
Balance, shares at Sep. 30, 2019	28,097				2,927
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)			(17,600)			(900)	(18,500)
Acquisition of noncontrolling interest of Adara Enterprises, Corp.		(3,000)				(1,600)	(4,600)
Disposition of Adara Asset Management to a related party		8,700					8,700
Pension adjustments, net of tax				20,600			20,600
Purchase of treasury stock, shares
Balance at Sep. 30, 2020		$ 1,059,600	$ (1,020,300)		$ (24,900)	$ 23,100	$ 37,500
Balance, shares at Sep. 30, 2020	28,097				2,927