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Redeemable Non-Controlling Interest (Temporary Equity) And Mandatorily Redeemable Equity Interests (Details) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Redeemable Noncontrolling Interest [Line Items]      
Payments for Repurchase of Redeemable Noncontrolling Interest $ 317 $ 6,152  
Distributions Mandatorily Redeemable Equity Interests 86 790  
Reclassification to Mandatorily Redeemable Equity Interests   6,446  
Mandatorily redeemable equity interests 0   86
Redeemable equity interests 535   829
PrinceRidge [Member]
     
Redeemable Noncontrolling Interest [Line Items]      
Payments for Repurchase of Redeemable Noncontrolling Interest   6,172  
Proceeds from Noncontrolling Interests   $ 20