Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 24, 2017	Sep. 25, 2016	Sep. 24, 2017	Sep. 25, 2016
Revenues:
Total revenues	$ 431,709	$ 422,442	$ 1,315,753	$ 1,274,001
Costs and expenses:
General and administrative expenses	37,330	40,549	117,340	123,419
Depreciation and amortization	11,181	10,614	32,292	30,389
Total costs and expenses	398,194	389,059	1,201,340	1,160,889
Operating income	33,515	33,383	114,413	113,112
Net interest expense	(2,566)	(1,756)	(6,135)	(4,876)
Income before income taxes	30,949	31,627	108,278	108,236
Income tax expense	8,280	8,977	30,728	33,423
Net income before attribution to noncontrolling interests	22,669	22,650	77,550	74,813
Income attributable to noncontrolling interests	(852)	(1,183)	(3,767)	(4,623)
Net income attributable to the Company	21,817	21,467	73,783	70,190
Calculation of income for earnings per share:
Net income attributable to the Company	21,817	21,467	73,783	70,190
Change in noncontrolling interest redemption value	237	(157)	1,419	342
Net income attributable to participating securities	(89)	(87)	(305)	(288)
Net income attributable to common shareholders	$ 21,965	$ 21,223	$ 74,897	$ 70,244
Basic earnings per common share	$ 0.61	$ 0.57	$ 2.05	$ 1.88
Diluted earnings per common share	$ 0.60	$ 0.57	$ 2.02	$ 1.86
Basic weighted average common shares outstanding	36,146	36,989	36,563	37,374
Diluted weighted average common shares outstanding	36,581	37,359	37,047	37,712
Dividends declared per common share	$ 0.225	$ 0.200	$ 0.625	$ 0.550
Domestic Company-owned restaurants
Revenues:
Total revenues	$ 196,267	$ 199,041	$ 605,919	$ 608,968
Costs and expenses:
Operating costs (excluding depreciation and amortization shown separately below)	161,867	161,750	489,719	486,529
North America franchising
Revenues:
Total revenues	25,567	24,776	79,762	76,554
North America commissary and other
Revenues:
Total revenues	178,083	169,684	539,532	503,623
Costs and expenses:
Operating costs (excluding depreciation and amortization shown separately below)	168,031	157,552	504,732	466,616
International
Revenues:
Total revenues	31,792	28,941	90,540	84,856
Costs and expenses:
Operating costs (excluding depreciation and amortization shown separately below)	$ 19,785	$ 18,594	$ 57,257	$ 53,936