Quarterly report pursuant to Section 13 or 15(d)

STOCKHOLDERS' EQUITY (Details)

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STOCKHOLDERS' EQUITY (Details) (USD $)
In Millions, except Share data
1 Months Ended 3 Months Ended 1 Months Ended
Jun. 30, 2011
Front Line [Member]
Dec. 31, 2010
Front Line [Member]
Feb. 28, 2011
Front Line [Member]
Common Stock [Member]
Mar. 31, 2011
Front Line [Member]
Common Stock [Member]
Jun. 30, 2011
Liberty Media [Member]
Common Stock [Member]
Feb. 28, 2011
Liberty Media [Member]
Common Stock [Member]
May 31, 2011
Vector [Member]
Common Stock [Member]
Business Acquisition, Equity Interests Issued or Issuable [Line Items]              
Shares issued in business combinations (in shares)     5,700,000       700,000
Common shares sold to related party pursuant to the subscription agreement (in shares)         5,500,000 1,800,000  
Noncontrolling interest common stock repurchased (in shares)       27,821      
Noncontrolling interest vested options repurchased (in shares)       3,402      
Carrying value of common stock and vested options repurchased   $ 82.4          
Noncontrolling interest restricted common shares repurchased (in shares)       15,376      
Carrying value of restricted common stock repurchased   24.0          
Fair value of redeemable put arrangements   22.5          
Carrying value of redeemable put arrangements   22.5          
Cost of acquired entity, purchase price $ 14.7