Significant Accounting Policies - Property and Equipment (Detail) - USD ($) $ in Millions	12 Months Ended
	Feb. 01, 2020	Feb. 02, 2019	Feb. 03, 2018
Property, Plant and Equipment [Line Items]
Lessee, Operating Lease, Existence of Option to Extend [true false]	true
Capitalized interest
Capitalized Interest	$ 4.9	$ 3.1	$ 3.3
Capitalized interest related to amortization of Convertible Notes debt discount	$ 3.7	$ 2.7	$ 2.5
Building and building improvements
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	40 years
Minimum | Machinery, equipment and aircraft
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	3 years
Minimum | Furniture, fixtures and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	3 years
Minimum | Computer software
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	3 years
Maximum | Machinery, equipment and aircraft
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	10 years
Maximum | Furniture, fixtures and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	7 years
Maximum | Computer software
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	10 years