Consolidated Statements of Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenues:
Rental revenues	$ 29,878	$ 30,324	$ 60,589	$ 61,165
Total revenues	228,080	184,471	465,262	372,634
Cost of revenues:
Franchise expenses:	78,907	82,944	159,210	164,816
Company restaurant expenses	31,232	0	62,770	0
Interest expense from finance leases	1,445	1,770	2,974	3,647
Other rental expenses	21,495	21,018	42,590	41,782
Rental expenses:	22,940	22,788	45,564	45,429
Financing expenses	146	149	292	299
Total cost of revenues	133,225	105,881	267,836	210,544
Gross profit	94,855	78,590	197,426	162,090
General and administrative expenses	39,364	38,759	82,183	80,670
Interest expense, net	14,602	15,481	29,995	30,680
Amortization of intangible assets	2,925	2,506	5,849	5,008
Closure and impairment charges (credits)	289	(2,702)	483	(98)
Loss on extinguishment of debt	8,276	0	8,276	0
Loss (gain) on disposition of assets	332	(50)	441	(1,477)
Income before income tax provision	29,067	24,596	70,199	47,307
Income tax provision	(7,677)	(11,883)	(17,166)	(17,521)
Net income	21,390	12,713	53,033	29,786
Other comprehensive income (loss) net of tax:
Adjustment to unrealized loss on available-for-sale investments	0	0	0	50
Foreign currency translation adjustment	2	(3)	1	(6)
Total comprehensive income	21,392	12,710	53,034	29,830
Net income available to common stockholders:
Net income	21,390	12,713	53,033	29,786
Less: Net income allocated to unvested participating restricted stock	(719)	(428)	(1,827)	(1,000)
Net income available to common stockholders - basic	$ 20,671	$ 12,285	$ 51,206	$ 28,786
Net income available to common stockholders per share:
Basic (USD per share)	$ 1.20	$ 0.70	$ 2.97	$ 1.63
Diluted (USD per share)	$ 1.18	$ 0.69	$ 2.91	$ 1.61
Weighted average shares outstanding:
Basic (in shares)	17,181	17,544	17,262	17,623
Diluted (in shares)	17,563	17,803	17,626	17,827
Franchise revenues
Revenues:
Revenue from contract with customer, excluding assessed tax	$ 162,668	$ 151,941	$ 331,594	$ 307,254
Royalties, franchise fees and other
Revenues:
Revenue from contract with customer, excluding assessed tax	90,930	93,236	187,226	184,713
Advertising revenue
Revenues:
Revenue from contract with customer, excluding assessed tax	71,738	58,705	144,368	122,541
Company restaurant sales
Revenues:
Revenue from contract with customer, excluding assessed tax	33,751	0	69,486	0
Financing revenues
Revenues:
Revenue from contract with customer, excluding assessed tax	1,783	2,206	3,593	4,215
Advertising fees
Revenues:
Revenue from contract with customer, excluding assessed tax	71,738	58,705	144,368	122,541
Cost of revenues:
Franchise expenses:	71,738	58,705	144,368	122,541
Other franchise expenses
Cost of revenues:
Franchise expenses:	$ 7,169	$ 24,239	$ 14,842	$ 42,275