Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 69,252	$ 51,433
Notes receivable		33,667
Other current assets	2,246	1,786
Total current assets	71,498	86,886
Investments in affiliates	54,352	104,792
Long-term deferred tax assets	108,732	112,898
Other assets	65	50
Total assets	234,647	304,626
Current liabilities:
Accrued employment costs	1,588	2,300
Other current liabilities	13,659	13,424
Total current liabilities	15,247	15,724
Pension and other postretirement liabilities	19,203	20,793
Long-term liabilities	87,354	92,469
Total liabilities	$ 121,804	$ 128,986
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	$ 1,018,203	$ 1,017,520
Treasury stock (at cost), 154,494 shares of voting common stock	(9,592)	(9,592)
Accumulated deficit	(868,220)	(803,378)
Accumulated other comprehensive loss	(27,859)	(29,221)
Total shareholders' equity	112,843	175,640
Total liabilities and shareholders' equity	234,647	304,626
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