Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 25, 2017	Jun. 26, 2016	Jun. 25, 2017	Jun. 26, 2016
Revenues:
Total revenues	$ 434,778	$ 422,964	$ 884,044	$ 851,559
Costs and expenses:
General and administrative expenses	42,003	42,623	80,010	82,870
Depreciation and amortization	10,654	10,031	21,111	19,775
Total costs and expenses	397,561	386,133	803,146	771,830
Operating income	37,217	36,831	80,898	79,729
Net interest expense	(1,759)	(1,631)	(3,569)	(3,120)
Income before income taxes	35,458	35,200	77,329	76,609
Income tax expense	10,476	11,088	22,448	24,446
Net income before attribution to noncontrolling interests	24,982	24,112	54,881	52,163
Income attributable to noncontrolling interests	(1,444)	(1,571)	(2,915)	(3,440)
Net income attributable to the Company	23,538	22,541	51,966	48,723
Calculation of income for earnings per share:
Net income attributable to the Company	23,538	22,541	51,966	48,723
Change in noncontrolling interest redemption value	662	279	1,182	499
Net income attributable to participating securities	(99)	(91)	(216)	(201)
Net income attributable to common shareholders	$ 24,101	$ 22,729	$ 52,932	$ 49,021
Basic earnings per common share	$ 0.66	$ 0.61	$ 1.44	$ 1.30
Diluted earnings per common share	$ 0.65	$ 0.61	$ 1.42	$ 1.29
Basic weighted average common shares outstanding	36,732	37,203	36,771	37,567
Diluted weighted average common shares outstanding	37,217	37,507	37,283	37,904
Dividends declared per common share	$ 0.20	$ 0.175	$ 0.40	$ 0.35
Domestic Company-owned restaurants
Revenues:
Total revenues	$ 202,756	$ 204,248	$ 409,652	$ 409,927
Costs and expenses:
Operating costs (excluding depreciation and amortization shown separately below)	162,433	163,469	327,852	324,779
North America franchising
Revenues:
Total revenues	26,588	25,302	54,195	51,778
North America commissary and other
Revenues:
Total revenues	175,204	164,954	361,449	333,939
Costs and expenses:
Operating costs (excluding depreciation and amortization shown separately below)	162,989	152,258	336,701	309,064
International
Revenues:
Total revenues	30,230	28,460	58,748	55,915
Costs and expenses:
Operating costs (excluding depreciation and amortization shown separately below)	$ 19,482	$ 17,752	$ 37,472	$ 35,342