Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 43,966	$ 87,370
Notes receivable	69,855	34,917
Deferred tax assets	13,811	4,165
Other current assets	3,546	2,655
Total current assets	131,178	129,107
Property, plant and equipment, net	41	42
Long-term receivables	33,667	67,333
Investments in affiliates	60,754	62,517
Long-term deferred tax assets	104,835	117,381
Other assets	2,612	2,612
Total assets	333,087	378,992
Current liabilities:
Accrued employment costs	5,299	4,922
Income taxes payable		34,505
Other current liabilities	30,542	32,089
Total current liabilities	35,841	71,516
Pension and other postretirement liabilities	23,046	25,174
Long-term liabilities	99,568	95,841
Total liabilities	158,455	192,531
Commitments and contingencies
Common Stock:
Paid-in capital	1,027,529	1,027,266
Treasury stock (at cost), 154,494 shares of voting common stock	(9,592)	(9,592)
Accumulated deficit	(807,592)	(794,128)
Accumulated other comprehensive loss	(36,022)	(37,394)
Total equity	174,632	186,461
Total liabilities and equity	333,087	378,992
Voting Common Stock [Member]
Common Stock:
Common stock, 0.01 par value	214	214
Nonvoting Common Stock [Member]
Common Stock:
Common stock, 0.01 par value	$ 95	$ 95