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Goodwill Goodwill (Tables)
 3 Months Ended
Mar. 31, 2015
Disclosure - Goodwill - Additional Information [Abstract]  
Carrying value of goodwill by reporting segment and the activity
The carrying value of goodwill and the activity for the three months ended March 31, 2015 are as follows (in thousands):
Balance, December 31, 2014
$
553,335

Currency translation adjustments
(16,555
)
Balance, March 31, 2015
$
536,780