SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)	12 Months Ended
	Dec. 31, 2022 USD ($) item	Dec. 31, 2021 USD ($) item	Dec. 31, 2020 USD ($) item
Summary of significant accounting policies
Revenues	$ 2,695,823,000	$ 2,424,300,000	$ 2,161,220,000
Goodwill impairment loss	0
Impairment of intangible assets	$ 0
Time Lapse Restricted Shares
Summary of significant accounting policies
Award vesting period		6 years
UNITED STATES
Summary of significant accounting policies
Number of franchise agreements | item	137	135	128
Revenues	$ 2,498,363,000	$ 2,240,226,000	$ 2,006,368,000
International
Summary of significant accounting policies
Number of franchise agreements | item	89	103	101
Revenues	$ 197,460,000	$ 184,074,000	$ 154,852,000
Percent of total revenues	7.00%	8.00%	7.00%
Cash held in FDIC	$ 26,700,000
Franchising revenue
Summary of significant accounting policies
Revenues	$ 15,500,000	$ 15,500,000	$ 15,200,000
Maximum | Time Lapse Restricted Shares
Summary of significant accounting policies
Award vesting period	5 years	6 years
Maximum | Franchising revenue
Summary of significant accounting policies
Percent of total revenues	1.00%	1.00%	1.00%
Maximum | Equipment rental
Summary of significant accounting policies
Percent of total revenues	1.00%	1.00%	1.00%