Annual report pursuant to Section 13 and 15(d)

STOCKHOLDERS' EQUITY, Common Stock and Noncontrolling Interests (Details)

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STOCKHOLDERS' EQUITY, Common Stock and Noncontrolling Interests (Details) (USD $)
In Thousands, except Share data in Millions, unless otherwise specified
1 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2012
Stock Options [Member]
Dec. 31, 2012
Restricted Stock [Member]
Feb. 28, 2011
Front Line [Member]
Jun. 30, 2011
Liberty Media [Member]
Feb. 28, 2011
Liberty Media [Member]
May 31, 2011
Vector [Member]
Business Acquisition, Equity Interests Issued or Issuable [Line Items]                
Shares issued in business combinations (in shares)         5.7     0.7
Common shares sold to related party pursuant to the subscription agreement (in shares)           5.5 1.8  
Redeemable noncontrolling interests equity carrying or fair value amount $ 42,100 $ 8,277            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Common stock reserved for future issuances under the stock incentive plan (in shares) 35.9   24.7 3.2