Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Sep. 15, 2021	Sep. 14, 2021	Aug. 30, 2018
Significant Accounting Policies [Line Items]
Capitalized computer software costs	$ 76,700,000	$ 51,600,000	$ 49,800,000
Capitalized computer software amortization expense	$ 46,700,000	40,200,000	37,200,000
Minimum percentage of likelihood required to recognize uncertain income tax position (in percent)	50.00%
Maturity of cash equivalent, max (in months)	3 months
Provision for credit losses	$ 35,868,000	146,063,000	67,732,000
Advertising expense	54,800,000	28,500,000	33,700,000
Increase in deferred income taxes	11,026,000	15,668,000	37,883,000
Decrease in accounts payable, accrued expenses and customer deposits	(430,159,000)	(59,203,000)	(198,756,000)
Net cash provided by operating activities	$ 1,197,063,000	1,472,589,000	$ 1,162,071,000
Revision of Prior Period, Error Correction, Adjustment
Significant Accounting Policies [Line Items]
Increase in deferred income taxes		30,800,000
Decrease in accounts payable, accrued expenses and customer deposits		30,800,000
Net cash provided by operating activities		0
SONIA
Significant Accounting Policies [Line Items]
Derivative basis spread on variable rate	0.0326%
International
Significant Accounting Policies [Line Items]
Provision for credit losses		90,100,000
Term Loan
Significant Accounting Policies [Line Items]
Deferred financing costs	$ 16,700,000	7,100,000
Revolving Credit Facility and Securitization Facility
Significant Accounting Policies [Line Items]
Deferred financing costs	5,800,000	6,400,000
Securitization Facility
Significant Accounting Policies [Line Items]
Securitized accounts receivable facility				$ 1,300,000,000	$ 1,000,000,000	$ 1,300,000,000
Securitization Facility | Second Amendment
Significant Accounting Policies [Line Items]
Securitized accounts receivable facility	1,300,000,000
New Credit Facility
Significant Accounting Policies [Line Items]
Payments of debt issuance costs	$ 2,300,000	$ 2,600,000
Minimum | Stock options
Significant Accounting Policies [Line Items]
Period of vesting provisions (in years)	1 year
Minimum | Restricted Stock And Restricted Stock Units
Significant Accounting Policies [Line Items]
Period of vesting provisions (in years)	1 year
Maximum | Stock options
Significant Accounting Policies [Line Items]
Period of vesting provisions (in years)	5 years
Maximum | Restricted Stock And Restricted Stock Units
Significant Accounting Policies [Line Items]
Period of vesting provisions (in years)	4 years
Customer Concentration Risk | Accounts Receivable | Accounts Receivable, after Allowance for Credit Loss, Current
Significant Accounting Policies [Line Items]
Concentration risk, percentage (more than)	96.00%	97.00%