Segment and Geographic Information - Operating Segment Data (Parenthetical) (Details) - USD ($) $ in Thousands	Jul. 31, 2019	Feb. 01, 2019	Jan. 31, 2019	Jul. 31, 2018
Segment Reporting Information [Line Items]
Operating lease right-of-use assets	$ 91,119		$ 0	$ 0
ASU 2016-02
Segment Reporting Information [Line Items]
Operating lease right-of-use assets		$ 97,000
ASU 2016-02 | Watch and Accessory Brands
Segment Reporting Information [Line Items]
Operating lease right-of-use assets	49,400
Company Stores | ASU 2016-02
Segment Reporting Information [Line Items]
Operating lease right-of-use assets	$ 41,700