Notes Payable - Long-term debt (Details) - USD ($) $ in Thousands	Oct. 31, 2019	Jan. 31, 2019	Oct. 31, 2018
Long-term Debt
Debt Instrument [Line Items]
Subtotal	$ 707,828	$ 425,000	$ 734,599
Less: Net debt issuance costs	(8,055)	(10,014)	(10,667)
Debt discount	(24,377)	(28,382)	(29,655)
Current portion of long-term debt	(655)
Total	674,741	386,604	694,277
Senior secured term loan facility (the "Term Loan") \| Long-term Debt
Debt Instrument [Line Items]
Subtotal	300,000	300,000	300,000
Revolving credit facility
Debt Instrument [Line Items]
Less: Net debt issuance costs	(5,200)	(7,100)	(7,700)
Revolving credit facility \| Long-term Debt
Debt Instrument [Line Items]
Subtotal	279,880		309,599
LVMH Note
Debt Instrument [Line Items]
Debt discount	(40,000)
LVMH Note \| Long-term Debt
Debt Instrument [Line Items]
Subtotal	125,000	$ 125,000	$ 125,000
Unsecured Loan \| Long-term Debt
Debt Instrument [Line Items]
Subtotal	$ 2,948

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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