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Intangible Assets (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Intangible Assets      
Intangible Assets, Beginning Balance $ 72,707 $ 75,018 $ 78,492
Goodwill and intangible assets, Beginning Balance 88,479 89,219 96,593
Acquisition of goodwill 78,795 434  
Foreign currency translation adjustment (2,196) 3,960 (15,300)
Amortization (15,323) (6,831) (6,161)
Impairment of goodwill 2,205
Goodwill and Intangible Assets, Ending Balance 338,847 88,479 89,219
Foreign currency translation adjustment (1,524) 2,823 (11,400)
Amortization (15,323) (6,831) (6,161)
Intangible Assets, Ending Balance 247,157 72,707 75,018
Goodwill      
Beginning balance 15,772 14,201 18,101
Acquisition of goodwill 78,795 434  
Foreign currency translation adjustment (672) 1,137 (3,900)
Impairment (2,205)
Ending balance 91,690 15,772 14,201
Trade Names      
Intangible Assets      
Acquisition of Intangible Assets 61,500 1,134 5,159
Acquisition of customer relationships 61,500 1,134 5,159
Customer Relationships      
Intangible Assets      
Acquisition of Intangible Assets 124,430 563 8,878
Acquisition of customer relationships 124,430 $ 563 8,878
Other      
Intangible Assets      
Acquisition of Intangible Assets 5,367   50
Acquisition of customer relationships $ 5,367   $ 50