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Segment Reporting Information (Parenthetical) (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Segment Reporting Information [Line Items]      
Contingent consideration fair value adjustment     $ 650
Restructuring expenses $ 1,024 $ 2,420 437
Depreciation charge 6,600 8,000 7,200
U.S. Wholesale      
Segment Reporting Information [Line Items]      
Restructuring expenses   2,420 437
International      
Segment Reporting Information [Line Items]      
Contingent consideration fair value adjustment     $ 1,000
Restructuring expenses $ 1,000    
Depreciation Adjustment      
Segment Reporting Information [Line Items]      
Depreciation charge   $ 1,200