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Intangible Asset and Goodwill (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2013
Goodwill [Roll Forward]  
Balance at December 31, 2012 $ 124,969
Additions to Goodwill 0
Impairment Charge of Goodwill 0
Balance at March 31, 2013 124,969
MID Segment
  
Goodwill [Roll Forward]  
Balance at December 31, 2012 19,905
Additions to Goodwill 0
Impairment Charge of Goodwill 0
Balance at March 31, 2013 19,905
CTO Segment
  
Goodwill [Roll Forward]  
Balance at December 31, 2012 8,070
Additions to Goodwill 0
Impairment Charge of Goodwill 0
Balance at March 31, 2013 8,070
All Other
  
Goodwill [Roll Forward]  
Balance at December 31, 2012 96,994
Additions to Goodwill 0
Impairment Charge of Goodwill 0
Balance at March 31, 2013 $ 96,994