Annual report pursuant to Section 13 and 15(d)

Income Taxes (Details Textual)

v2.4.0.8
Income Taxes (Details Textual) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2013
Common Stock [Member]
Liberty Media [Member]
Nov. 04, 2013
Agero, Inc. [Member]
Related Party Transaction [Line Items]          
Operating loss carryforwards, exclusive of excess share-based compensation deductions $ 5,828,461        
Deferred tax assets, valuation allowance, excess share-based compensation deductions 702,187        
Operating loss carryforwards, per tax return 6,530,648        
Increase (decrease) in valuation allowance   (3,350,905)      
Valuation allowance 7,831 9,835      
Deferred tax assets, net, current         767
Deferred tax liabilities, net, noncurrent         78,127
Deferred tax liabilities, operating loss attributable to acquired company         4,340
Deferred tax liabilities, operating loss attributable to acquired company, amount fully valued         2,224
Unrecognized tax benefits 1,432 1,432 1,432    
Unrecognized tax benefits, increase resulting from interest $ 40 $ 55      
Related party ownership percentage (greater than 50%)       50.00%