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Goodwill and Intangible Assets (Tables)
 3 Months Ended
Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]  
Changes in Goodwill
Changes in goodwill during the three months ended March 31, 2015 are as follows:
(In thousands)
Goodwill
Balance at January 1
$
252,520

Currency translation
(5,867
)
Balance at March 31
246,653
Changes in Intangible Assets, Net of Accumulated Amortization
Changes in intangible assets, net of accumulated amortization during the three months ended March 31, 2015 are as follows:
(In thousands)
Intangible Assets
Net balance at January 1
$
31,323

Amortization expense
(352
)
Currency translation
(976
)
Net balance at March 31
29,995