SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) segment	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)
Disclosure Of Summary Of Significant Accounting Policies [Line Items]
Number of operating segments | segment			1
Credit losses on marketable securities			$ 0	$ 0
Self-insurance accrual, net	$ 3,100,000		3,100,000		$ 2,700,000
Restricted cash					0
Deferred revenue, revenue recognized	256,500,000	$ 238,000,000.0	507,800,000	$ 439,800,000
Aggregate amount of transaction price allocated to remaining performance obligations	1,400,000,000		1,400,000,000
Funds Held For Customers
Disclosure Of Summary Of Significant Accounting Policies [Line Items]
Restricted cash	6,300,000		6,300,000		$ 0
Corporate Credit Cards
Disclosure Of Summary Of Significant Accounting Policies [Line Items]
Restricted cash	600,000		600,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-10-01
Disclosure Of Summary Of Significant Accounting Policies [Line Items]
Aggregate amount of transaction price allocated to remaining performance obligations	$ 911,200,000		$ 911,200,000
Percentage of remaining performance obligation expects to recognize as revenue	65.00%		65.00%
Revenue, remaining performance obligation, expected timing of satisfaction, period	12 months		12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-10-01
Disclosure Of Summary Of Significant Accounting Policies [Line Items]
Aggregate amount of transaction price allocated to remaining performance obligations	$ 498,300,000		$ 498,300,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-10-01 | Minimum
Disclosure Of Summary Of Significant Accounting Policies [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	12 months		12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-10-01 | Maximum
Disclosure Of Summary Of Significant Accounting Policies [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	36 months		36 months