Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 25, 2019	Sep. 26, 2018	Sep. 25, 2019	Sep. 26, 2018
Revenue:
Total operating revenue	$ 124,258	$ 158,023	$ 427,553	$ 470,630
Costs of company restaurant sales, excluding depreciation and amortization:
Product costs	15,603	25,303	62,871	75,292
Payroll and benefits	23,777	41,041	100,475	123,332
Occupancy	4,301	6,083	15,583	17,165
Other operating expenses	10,625	15,419	39,320	45,490
Total costs of company restaurant sales	54,306	87,846	218,249	261,279
Costs of franchise and license revenue, excluding depreciation and amortization	31,136	28,174	87,065	85,779
General and administrative expenses	16,395	15,981	53,659	48,138
Depreciation and amortization	4,338	6,760	15,619	19,965
Operating (gains), losses and other charges, net	(50,091)	793	(85,459)	1,615
Total operating costs and expenses, net	56,084	139,554	289,133	416,776
Operating income	68,174	18,469	138,420	53,854
Interest expense, net	4,188	5,314	14,977	15,324
Other nonoperating income, net	(415)	(460)	(2,111)	(877)
Income before income taxes	64,401	13,615	125,554	39,407
Provision for income taxes	15,279	2,810	26,703	7,217
Net income	$ 49,122	$ 10,805	$ 98,851	$ 32,190
Basic net income per share (in dollars per share)	$ 0.83	$ 0.17	$ 1.64	$ 0.50
Diluted net income per share (in dollars per share)	$ 0.80	$ 0.16	$ 1.58	$ 0.49
Basic weighted average shares outstanding (in shares)	59,430	63,246	60,457	63,774
Diluted weighted average shares outstanding (in shares)	61,189	65,522	62,370	66,122
Franchisor Owned Outlet [Member]
Revenue:
Total operating revenue	$ 63,582	$ 103,609	$ 257,574	$ 307,543
Franchise [Member]
Revenue:
Total operating revenue	$ 60,676	$ 54,414	$ 169,979	$ 163,087