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Debt, Inventory Financing Facilities, Finance Leases and Other Financing Obligations - Additional Information (Detail)				9 Months Ended
	Aug. 30, 2019 USD ($)	Aug. 15, 2019 USD ($)	Jul. 10, 2019 USD ($)	Sep. 30, 2019 USD ($) shares d $ / shares	Aug. 23, 2019 USD ($)	Dec. 31, 2018 USD ($)
Debt Instrument [Line Items]
Payments to convertible note hedge transaction				$ 66,325,000
Proceeds from issuance of warrants				34,440,000
Accounts payable-inventory financing facility				207,658,000		$ 304,130,000
Finance lease obligations				1,813,000		$ 2,920,000
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
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 principal amount redeemed				100.00%
Convertible senior notes, remaining accretion period of debt discount and issuance cost				5 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 issuance 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				553,000,000
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
Senior Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility, borrowing capacity	350,000,000
Senior Revolving Credit Facility [Member] \| Foreign Currency Borrowings [Member]
Debt Instrument [Line Items]
Credit facility, borrowing capacity	50,000,000
ABS Facility [Member]
Debt Instrument [Line Items]
Credit facility, borrowing capacity	250,000,000
Inventory Financing Facility [Member]
Debt Instrument [Line Items]
Inventory financing facility maximum borrowing capacity				450,000,000
Accounts payable-inventory financing facility				$ 207,658,000
Inventory Financing Facility [Member] \| Wells Fargo [Member]
Debt Instrument [Line Items]
Inventory financing facility interest rate if balances are not paid within stated vendor terms				prime plus 1.25%
Inventory financing facility rate if vendor terms not met equal prime plus				1.25%
Unsecured Inventory Financing Facility [Member] \| Wells Fargo [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]
Accounts payable-inventory financing facility			$ 200,000,000
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%