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GOODWILL AND INTANGIBLE ASSETS (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Mar. 31, 2013
Dec. 31, 2012
GOODWILL AND INTANGIBLE ASSETS    
Carrying value of goodwill $ 89,000 $ 89,000
Intangible Assets, Net consists of the following:    
Finite - Lived Intangible Assets 218,886 218,886
Accumulated Amortization (26,387) (21,402)
Intangible Assets, Net 192,499 197,484
Changes in Intangible Assets, Net consists of the following:    
Balance, Beginning of Year 197,484 24,310
Acquisitions   181,000
Amortization Expense (4,985) (7,826)
Balance, End of Year 192,499 197,484
Amortization expense relating to intangible assets held expected to be amortized    
April 1 - December 31, 2013 14,954  
2014-2016 59,816  
2017 19,389  
January 1 - March 31, 2018 4,435  
Thereafter 93,905  
Intangible Assets, Net $ 192,499 $ 197,484
Weighted-average period over which intangible assets is expected to be amortized 11 years