Segments - Schedule of Segment Reporting Information by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting Information [Line Items]
Rental revenues		$ 29,066		$ 57,873
Interest expense	$ 18,800	17,200	$ 34,500	34,700
Depreciation and amortization	8,400	10,000	17,651	19,969
Pretax book income (loss)	24,437	32,531	60,606	66,688
Total revenues	208,415	237,794	422,182	468,217
Operating Segments
Segment Reporting Information [Line Items]
Pretax book income (loss)	97,300	95,700	201,000	188,400
Corporate
Segment Reporting Information [Line Items]
Interest expense	17,800	15,400	32,500	30,900
Depreciation and amortization	3,300	3,000	7,500	5,900
Pretax book income (loss)	(72,900)	(63,200)	(140,400)	(121,800)
Franchise operations | Operating Segments
Segment Reporting Information [Line Items]
Depreciation and amortization	2,400	2,500	4,900	5,000
Pretax book income (loss)	89,600	86,000	182,200	169,200
Rental operations | Operating Segments
Segment Reporting Information [Line Items]
Rental revenues	29,440	29,100	61,391	57,900
Interest expense	1,000	1,000	2,000	2,200
Depreciation and amortization	2,600	2,600	5,300	5,300
Pretax book income (loss)	7,200	7,200	17,500	13,900
Company restaurants | Operating Segments
Segment Reporting Information [Line Items]
Interest expense	0	800	0	1,600
Depreciation and amortization	0	1,900	0	3,800
Pretax book income (loss)	0	1,600	0	3,600
Financing operations | Operating Segments
Segment Reporting Information [Line Items]
Pretax book income (loss)	500	900	1,200	1,700
Franchise operations
Segment Reporting Information [Line Items]
Revenue from contract with customer	177,917	168,259	357,879	329,491
Franchise operations | Franchise operations | Operating Segments
Segment Reporting Information [Line Items]
Revenue from contract with customer	177,917	168,300	357,879	329,500
Company restaurants
Segment Reporting Information [Line Items]
Revenue from contract with customer		39,511		78,927
Company restaurants | Company restaurants
Segment Reporting Information [Line Items]
Revenue from contract with customer	474	39,500	1,531	78,900
Financing revenues
Segment Reporting Information [Line Items]
Revenue from contract with customer		958		1,926
Financing revenues | Financing operations | Operating Segments
Segment Reporting Information [Line Items]
Revenue from contract with customer	$ 584	$ 900	$ 1,381	$ 1,900