Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Jul. 31, 2018	Jan. 31, 2018	Jul. 31, 2017
Debt Instrument [Line Items]
Debt instruments, carrying value	$ 536,426	$ 437,003	$ 618,955
Term loan
Debt Instrument [Line Items]
Debt instruments, carrying value	300,000	300,000	300,000
Revolving credit facility
Debt Instrument [Line Items]
Debt instruments, carrying value	111,426	12,003	193,955
LVMH Note
Debt Instrument [Line Items]
Debt instruments, carrying value	125,000	125,000	$ 125,000
Level 2 | Term loan
Debt Instrument [Line Items]
Debt instruments, carrying value	300,000	300,000
Debt instruments, fair value	300,000	300,000
Level 2 | Revolving credit facility
Debt Instrument [Line Items]
Debt instruments, carrying value	111,426	12,003
Debt instruments, fair value	111,426	12,003
Level 3 | LVMH Note
Debt Instrument [Line Items]
Debt instruments, carrying value	94,100	91,667
Debt instruments, fair value	$ 85,000	$ 85,000