Income Taxes Deferred Taxes (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Deferred tax assets:
Net operating loss and capital loss carryforwards and credits	$ 15,668	$ 7,626
Amortization and depreciation	0	6,252
Stock compensation	1,140	2,665
Basis of investments in affiliates	415	1,375
Accrued liabilities and other	250	471
Unrealized loss on short-term investments	415	746
State taxes	212	124
Other	0	278
Total deferred tax assets	18,100	19,537
Deferred tax liabilities:
State taxes	0	0
Fixed assets and intangibles	(39,457)	0
Other	(60)	0
Total deferred tax liabilities	(39,517)	0
Net deferred tax liabilities	(21,417)	19,537
Less: valuation allowance	(5,396)	(19,537)
Net deferred taxes	$ (26,813)	$ 0