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Redeemable Noncontrolling Interest (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Redeemable Noncontrolling Interest [Roll Forward]        
Redeemable noncontrolling interest, beginning of period     $ 0  
Acquisition date value of noncontrolling interest     3,131  
Net income attributable to redeemable noncontrolling interest 122 0 122 0
Other comprehensive loss attributable to redeemable noncontrolling interest     (109)  
Redeemable noncontrolling interest, end of period $ 3,144 $ 0 $ 3,144 $ 0