Xponential Fitness, Inc. Quarterly report [Sections 13 or 15(d)]

Summary of Significant Accounting Policies - Summary of Supplemental Statement of Operations Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Supplemental Statement of Operations [Line Items]
Impairment of goodwill and other noncurrent assets	$ 0	$ 17,568	$ 0	$ 32,411
Goodwill
Supplemental Statement of Operations [Line Items]
Impairment of goodwill and other noncurrent assets			0	7,451
Indefinite-lived intangible assets
Supplemental Statement of Operations [Line Items]
Impairment of goodwill and other noncurrent assets			0	3,449
Definite-lived intangible assets
Supplemental Statement of Operations [Line Items]
Impairment of goodwill and other noncurrent assets			0	12,700
Property, Plant and Equipment
Supplemental Statement of Operations [Line Items]
Impairment of goodwill and other noncurrent assets			0	2,234
Right-of-use assets
Supplemental Statement of Operations [Line Items]
Impairment of goodwill and other noncurrent assets			$ 0	$ 6,577