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Segment Information - Pre-Tax Depreciation and Amortization by Operating Segment (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Segment Reporting Information [Line Items]    
Depreciation and amortization of property and equipment $ 5,433 $ 6,830
Amortization of intangible assets 3,611 4,223
Depreciation and amortization, total 9,044 11,053
North America Segment [Member]    
Segment Reporting Information [Line Items]    
Depreciation and amortization of property and equipment 4,298 5,553
Amortization of intangible assets 3,360 4,012
EMEA Segment [Member]    
Segment Reporting Information [Line Items]    
Depreciation and amortization of property and equipment 1,003 1,150
Amortization of intangible assets 74 12
APAC Segment [Member]    
Segment Reporting Information [Line Items]    
Depreciation and amortization of property and equipment 132 127
Amortization of intangible assets $ 177 $ 199