Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Apr. 30, 2020	Jan. 31, 2020	Apr. 30, 2019
Senior secured term loan facility (the "Term Loan")
Debt Instrument [Line Items]
Debt instruments, carrying value	$ 300,000
Level 2 | Senior secured term loan facility (the "Term Loan")
Debt Instrument [Line Items]
Debt instruments, carrying value	300,000	$ 300,000	$ 300,000
Debt instruments, fair value	300,000	300,000	300,000
Level 2 | Revolving credit facility
Debt Instrument [Line Items]
Debt instruments, carrying value	500,000		22,509
Debt instruments, fair value	500,000		22,509
Level 2 | Unsecured Loan
Debt Instrument [Line Items]
Debt instruments, carrying value	4,504	2,860
Debt instruments, fair value	4,504	2,860
Level 3 | LVMH Note
Debt Instrument [Line Items]
Debt instruments, carrying value	103,438	102,009	97,938
Debt instruments, fair value	$ 109,910	$ 95,126	$ 90,065