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Subsequent Events Subsequent Events (Details) - USD ($)
shares in Thousands, $ in Thousands
2 Months Ended 12 Months Ended
Feb. 24, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Subsequent Event [Line Items]        
Treasury Stock, Shares, Acquired   3,757 0  
Long-term Line of Credit   $ 0 $ 24,600  
Repurchases of common stock   $ 74,024 $ 0 $ 0
Subsequent Event [Member]        
Subsequent Event [Line Items]        
Treasury Stock, Shares, Acquired 922      
Repurchases of common stock $ (14,678)