Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 19,986	$ 31,631
Income tax refund receivable	1,299	1,228
Other current assets	1,194	1,232
Total current assets	22,479	34,091
Right-of-use asset	159	342
Investments in affiliates	241,499	192,664
Deferred tax assets	29,280	27,339
Other assets	31	33
Total assets	293,448	254,469
Current liabilities:
Accrued employment costs	9,759	2,839
Other current liabilities	2,534	2,002
Total current liabilities	12,293	4,841
Pension and other post-retirement liabilities	19,214	20,181
Other liabilities	20,667	19,914
Total liabilities	52,174	44,936
Commitments and contingencies
Shareholders' Equity:
Preferred stock, $0.01 par value	0	0
Common Stock:
Paid-in capital	1,019,988	1,019,988
Accumulated deficit	(702,203)	(729,202)
Accumulated other comprehensive loss	(67,230)	(71,972)
Total shareholders' equity	241,274	209,533
Total liabilities and shareholders' equity	293,448	254,469
Voting Common Stock [Member]
Common Stock:
Common stock, $0.01 par value	216	216
Treasury stock (at cost), 154,494 shares of voting common stock	(9,592)	(9,592)
Nonvoting Common Stock [Member]
Common Stock:
Common stock, $0.01 par value	95	95
Series A Preferred Stock [Member]
Shareholders' Equity:
Preferred stock, $0.01 par value	0	0
Series B Preferred Stock [Member]
Shareholders' Equity:
Preferred stock, $0.01 par value	$ 0	$ 0