Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets, net - Amortization Expense (Details)

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Intangible Assets, net - Amortization Expense (Details) (USD $)
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]    
2013 (3 months ended) $ 27,354,000  
2014 23,134,000  
2015 21,303,000  
2016 19,151,000  
2017 15,516,000  
Thereafter 27,383,000  
Net Carrying Value 133,841,000  
Amortization of intangible assets $ 7,800,000 $ 4,200,000