Consolidated Statements of Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenues:
Rental revenues	$ 29,207	$ 31,273	$ 87,080	$ 84,797
Total revenues	233,220	228,719	701,437	666,537
Cost of revenues:
Franchise expenses	80,264	75,669	240,565	219,869
Bad debt credit	(77)	(1,962)	(523)	(4,246)
Company restaurant expenses	36,513	33,867	111,802	101,510
Interest expense from finance leases	740	822	2,254	2,677
Other rental expenses	21,268	23,645	63,720	63,359
Total rental expenses	22,008	24,467	65,974	66,036
Financing expenses	104	113	317	356
Total cost of revenues	138,889	134,116	418,658	387,771
Gross profit	94,331	94,603	282,779	278,766
General and administrative expenses	46,335	43,704	131,946	122,891
Interest expense, net	15,300	15,712	46,192	47,922
Closure and impairment charges	1,636	443	3,093	5,024
Amortization of intangible assets	2,664	2,664	7,994	8,015
Loss on extinguishment of debt	1,161	9	1,161	34
(Gain) loss on disposition of assets	(1,502)	1,299	(3,032)	1,436
Income before income taxes	28,737	30,772	95,425	93,444
Income tax provision	(7,789)	(7,661)	(25,665)	(15,368)
Net income	20,948	23,111	69,760	78,076
Other comprehensive income, net of tax:
Foreign currency translation adjustment	(5)	(2)	(9)	(4)
Total comprehensive income	20,943	23,109	69,751	78,072
Net income available to common stockholders:
Net income	20,948	23,111	69,760	78,076
Less: Net income allocated to unvested participating restricted stock	(575)	(502)	(1,852)	(1,920)
Net income available to common stockholders	$ 20,373	$ 22,609	$ 67,908	$ 76,156
Net income available to common stockholders per share:
Basic (USD per share)	$ 1.32	$ 1.34	$ 4.23	$ 4.55
Diluted (USD per share)	$ 1.32	$ 1.33	$ 4.22	$ 4.52
Weighted average shares outstanding:
Basic (in shares)	15,377	16,911	16,049	16,752
Diluted (in shares)	15,403	16,971	16,079	16,858
Franchise Revenue:
Revenues:
Revenue from contract with customer	$ 164,907	$ 161,126	$ 494,398	$ 469,056
Royalties, franchise fees and other
Revenues:
Revenue from contract with customer	93,215	90,417	277,712	265,138
Advertising revenues
Revenues:
Revenue from contract with customer	71,692	70,709	216,686	203,918
Company restaurant sales
Revenues:
Revenue from contract with customer	38,248	35,275	117,175	109,418
Financing revenues
Revenues:
Revenue from contract with customer	858	1,045	2,784	3,266
Advertising fees
Revenues:
Revenue from contract with customer	71,692	70,709	216,686	203,918
Cost of revenues:
Franchise expenses	71,692	70,709	216,686	203,918
Other franchise expenses
Cost of revenues:
Franchise expenses	$ 8,649	$ 6,922	$ 24,402	$ 20,197