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SCHEDULE I CONDENSED FINANCIAL INFORMATION OF REGISTRANT (Background and Basis of Presentation) (Details) (Parent, USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Parent
     
Condensed Financial Statements, Captions [Line Items]      
Proceeds from Equity Method Investment, Dividends or Distributions, Return of Capital $ 25,000 $ 22,950 $ 23,000