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Commitments and Contingencies (Details 2) (USD $)
 3 Months Ended 12 Months Ended
Mar. 31, 2009
Dec. 31, 2008
Dec. 31, 2011
Y
Dec. 31, 2010
Dec. 31, 2009
Contractual obligations          
2012     $ 36,572,000    
2013     33,786,000    
2014     201,872,000    
2015     8,454,000    
2016     8,340,000    
Thereafter     27,378,000    
Total     316,402,000    
Unrecognized tax benefits   9,613,000 16,610,000 11,816,000 10,353,000
Unrecognized tax benefits, reduction of long-term deferred tax assets, before federal tax benefit     7,000,000 7,200,000  
Unrecognized tax benefits included in long-term income taxes payable     9,600,000 4,600,000  
Terms of Noncancellable License Agreement, Minimum (in years)     1    
Rent expense     2,700,000 6,800,000 6,300,000
Deferred rent     500,000 500,000  
Cumulative payments made by the Company on behalf of current and former officers     31,900,000 15,700,000  
Settlement of claims     10,900,000    
Proceeds from former officers under settlement agreement 4,500,000        
Cumulative proceeds from former officers under settlement agreement 5,300,000        
Number of shares received from former officers   163,000      
Value of shares received from former officers   800,000      
Cumulative proceeds from insurance settlements     12,300,000    
Imputed financing obligation
          
Contractual obligations          
2012     5,999,000    
2013     6,828,000    
2014     6,997,000    
2015     7,168,000    
2016     7,348,000    
Thereafter     26,020,000    
Total     60,360,000    
Leases
          
Contractual obligations          
2012     2,933,000    
2013     1,307,000    
2014     1,316,000    
2015     1,286,000    
2016     992,000    
Thereafter     1,358,000    
Total     9,192,000    
Software licenses
          
Contractual obligations          
2012     2,348,000    
2013     359,000    
2014     80,000    
Total     2,787,000    
CRI retention bonus
          
Contractual obligations          
Number of installments that will be paid in cash     1    
2012     16,667,000    
2013     16,667,000    
2014     16,666,000    
Total     50,000,000    
Convertible notes.
          
Contractual obligations          
2014     172,500,000    
Total     172,500,000    
Interest payments related to convertible notes
          
Contractual obligations          
2012     8,625,000    
2013     8,625,000    
2014     4,313,000    
Total     $ 21,563,000