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Restatement of Previously Issued Consolidated Financial Statements - Consolidated Statement of Changes in Equity Restated (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Net income $ 60,486 $ 48,909
As Reported [Member]
   
Net income 75,831 45,147
Restatement Adjustment [Member]
   
Net income $ (15,345) $ 3,762