Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 51,433	$ 5,926
Notes receivable	33,667	67,333
Income taxes receivable	11	13,234
Other current assets	1,775	4,352
Total current assets	86,886	90,845
Long-term receivables		33,667
Investments in affiliates	104,792	116,820
Long-term deferred tax assets	112,898	83,708
Other assets	50	2,700
Total assets	304,626	327,740
Current liabilities:
Accrued employment costs	2,300	960
Other current liabilities	13,424	8,750
Total current liabilities	15,724	9,710
Pension and other postretirement liabilities	20,793	17,003
Long-term liabilities	92,469	93,117
Total liabilities	128,986	119,830
Commitments and contingencies
Shareholders' equity:
Preferred stock, 0.01 par value; 10,000,000 shares authorized, no shares issued and outstanding
Common Stock:
Paid-in capital	1,017,520	1,015,656
Treasury stock (at cost), 154,494 shares of voting common stock	(9,592)	(9,592)
Accumulated deficit	(803,378)	(777,549)
Accumulated other comprehensive loss	(29,221)	(20,916)
Total equity	175,640	207,910
Total liabilities and equity	304,626	327,740
Voting Common Stock [Member]
Common Stock:
Common stock, 0.01 par value	216	216
Nonvoting Common Stock [Member]
Common Stock:
Common stock, 0.01 par value	$ 95	$ 95