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Goodwill and Intangible Assets (Tables)
6 Months Ended
Jun. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Changes in Goodwill
Changes in goodwill during the six months ended June 30, 2021 are as follows:
(In thousands)Goodwill
Balance at January 1, 2021$443,272 
Additions (Note 18)4,056 
Currency translation(61)
Balance at June 30, 2021$447,267 
Changes in Intangible Assets, Net of Accumulated Amortization
Changes in intangible assets, net during the six months ended June 30, 2021, are as follows:
(In thousands)Intangible Assets
Net balance at January 1, 2021$161,051 
Additions (Note 18)5,940 
Amortization expense(6,168)
Currency translation579 
Net balance at June 30, 2021$161,402