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Goodwill and Intangible Assets (Tables)
 6 Months Ended
Jun. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]  
Changes in Goodwill
Changes in goodwill during the six months ended June 30, 2015 are as follows:
(In thousands)
Goodwill
Balance at January 1
$
252,520

Currency translation
(4,104
)
Balance at June 30
$
248,416
Changes in Intangible Assets, Net of Accumulated Amortization
Changes in intangible assets, net of accumulated amortization during the six months ended June 30, 2015 are as follows:
(In thousands)
Intangible Assets
Net balance at January 1
$
31,323

Amortization expense
(1,422
)
Impairment Loss
(723
)
Currency translation
(704
)
Net balance at June 30
$
28,474