Commitments and Contingencies (Details)	9 Months Ended
	Oct. 31, 2015
Property leases | Maximum
Leases
Lease expiration date	Sep. 30, 2031
Retail store leases | Minimum
Leases
Percentage of annual sales volume used for incremental rent on certain retail store leases	2.00%
Retail store leases | Maximum
Leases
Percentage of annual sales volume used for incremental rent on certain retail store leases	12.00%
Equipment operating leases | Maximum
Leases
Lease expiration date	Jul. 30, 2020