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Fair Value of Financial Instruments (Details) - USD ($)
$ in Thousands
Apr. 30, 2018
Jan. 31, 2018
Apr. 30, 2017
Debt Instrument [Line Items]      
Debt instruments, carrying value $ 492,377 $ 437,003 $ 545,000
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 67,377 12,003 120,000
Note issued to LVMH      
Debt Instrument [Line Items]      
Debt instruments, carrying value 125,000 125,000 $ 125,000
Level 3 | Term loan      
Debt Instrument [Line Items]      
Debt instruments, carrying value 300,000 300,000  
Debt instruments, fair value 300,000 300,000  
Level 3 | Revolving credit facility      
Debt Instrument [Line Items]      
Debt instruments, carrying value 67,377 12,003  
Debt instruments, fair value 67,377 12,003  
Level 3 | Note issued to LVMH      
Debt Instrument [Line Items]      
Debt instruments, carrying value 92,860 91,667  
Debt instruments, fair value $ 85,000 $ 85,000