Income Taxes Deferred Taxes (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred tax assets:
Net operating loss and capital loss carryforwards and credits	$ 34,679	$ 15,668
Stock compensation	3,052	1,140
Basis of investments in affiliates	867	415
Accrued liabilities and other	387	250
Unrealized loss on short-term investments	337	415
State taxes	18	212
Total deferred tax assets	39,340	18,100
Deferred tax liabilities:
Fixed assets and intangibles	(33,378)	(39,457)
Other	(112)	(60)
Net deferred tax liabilities	5,850	(21,417)
Less: valuation allowance	(7,585)	(5,396)
Net deferred taxes	$ (1,735)	$ (26,813)