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Debt, Inventory Financing Facilities, Finance Leases and Other Financing Obligations - Additional Information (Detail)			9 Months Ended
	Aug. 30, 2019 USD ($)	Aug. 15, 2019 USD ($)	Sep. 30, 2020 USD ($) shares d $ / shares	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)	Aug. 23, 2019 USD ($)
Debt Instrument [Line Items]
Payments to convertible note hedge transaction				$ 66,325,000
Proceeds from sale of warrants				$ 34,440,000
Accounts payable-inventory financing facility			$ 367,997,000		$ 253,676,000
Convertible Senior Notes due 2025 [Member]
Debt Instrument [Line Items]
Aggregate principal amount of convertible senior notes, issued amount		$ 300,000,000	$ 350,000,000		350,000,000
Convertible senior notes, maturity date		Feb. 15, 2025
Additional aggregate principal amount of notes issued						$ 50,000,000
Convertible senior notes, interest rate		0.75%
Convertible senior notes, payable term			payable semiannually, in arrears, on February 15th and August 15th of each year.
Number of trading days \| d			20
Number of consecutive trading days \| d			30
Percentage of last reported sale price to conversion price on each applicable trading day			130.00%
Principal amount per note used in conversion rate			$ 1,000
Debt Conversion, initial conversion rate \| shares			14.6376
Conversion price per share \| $ / shares			$ 68.32
Repurchase price as percentage of principal amount			100.00%
Shares issuable upon conversion of debt \| shares			6,788,208
Debt instrument, redemption price, percentage of outstanding principal amount redeemed			100.00%
Convertible senior notes, remaining accretion period of debt discount and issuance cost			4 years 4 months 15 days
Convertible senior notes, effective interest rate			4.325%
Conversion price per share \| $ / shares			$ 68.32
Convertible note hedge expiration date			Feb. 15, 2025
Payments to convertible note hedge transaction			$ 66,325,000
Warrants sold to purchase of additional common stock \| shares			5,123,160
Warrant price per share to purchase additional common stock \| $ / shares			$ 103.12
Warrants expiration date			May 15, 2025
Proceeds from sale of warrants			$ 34,440,000
Convertible Senior Notes due 2025 [Member] \| Scenario One [Member]
Debt Instrument [Line Items]
Number of trading days \| d			20
Number of consecutive trading days \| d			30
Percentage of last reported sale price to conversion price on each applicable trading day			130.00%
Convertible Senior Notes due 2025 [Member] \| Scenario Two [Member]
Debt Instrument [Line Items]
Number of consecutive trading days \| d			5
Percentage of last reported sale price to conversion price on each applicable trading day			98.00%
Measurement period			5 days
Convertible Senior Notes due 2025 [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Option to purchase common stock, shares \| shares			5,123,160
ABL Facility [Member]
Debt Instrument [Line Items]
Credit facility, borrowing capacity	$ 1,200,000,000
Line of credit maturity date	Aug. 30, 2024
Amount of facility permitted by qualified receivables			$ 1,200,000,000
Line of credit outstanding amount			0		$ 570,706,000
ABL Facility [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Credit facility, increase in amount available for borrowing	$ 500,000,000
ABL Facility [Member] \| Foreign Currency Borrowings [Member]
Debt Instrument [Line Items]
Credit facility, borrowing capacity	$ 150,000,000
Inventory Financing Facility [Member]
Debt Instrument [Line Items]
Inventory financing facility maximum borrowing capacity			500,000,000
Accounts payable-inventory financing facility			$ 367,997,000
Inventory Financing Facility [Member] \| PNC Facility [Member]
Debt Instrument [Line Items]
Inventory financing facility interest rate if balances are not paid within stated vendor terms			LIBOR plus 4.50%
Inventory financing facility rate if vendor terms not met equal LIBOR plus			4.50%
Unsecured Inventory Financing Facility [Member] \| PNC Facility [Member]
Debt Instrument [Line Items]
Inventory financing facility maximum borrowing capacity			$ 250,000,000
Unsecured Inventory Financing Facility [Member] \| MUFG Bank Ltd [Member]
Debt Instrument [Line Items]
Inventory financing facility interest rate if balances are not paid within stated vendor terms			prime plus 2.00%
Inventory financing facility rate if vendor terms not met equal prime plus			2.00%
Unsecured Inventory Financing Facility [Member] \| Maximum [Member] \| MUFG Bank Ltd [Member]
Debt Instrument [Line Items]
Accounts payable-inventory financing facility			$ 250,000,000
Unsecured Inventory Financing Facility [Member] \| Minimum [Member] \| MUFG Bank Ltd [Member]
Debt Instrument [Line Items]
Accounts payable-inventory financing facility			$ 200,000,000