Condensed Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
Mar. 29, 2015	Mar. 30, 2014
Total revenues	$ 432,284us-gaap_Revenues	$ 401,377us-gaap_Revenues
General and administrative expenses	41,933us-gaap_GeneralAndAdministrativeExpense	36,966us-gaap_GeneralAndAdministrativeExpense
Other general expenses	1,816us-gaap_OtherGeneralExpense	1,533us-gaap_OtherGeneralExpense
Depreciation and amortization	10,041	9,164
Total costs and expenses	394,639us-gaap_CostsAndExpenses	369,375us-gaap_CostsAndExpenses
Operating income	37,645us-gaap_OperatingIncomeLoss	32,002us-gaap_OperatingIncomeLoss
Net interest (expense) income	(1,209)	(592)
Income before income taxes	36,436	31,410
Income tax expense	12,197us-gaap_IncomeTaxExpenseBenefit	10,869us-gaap_IncomeTaxExpenseBenefit
Net income before attribution to noncontrolling interests	24,239us-gaap_ProfitLoss	20,541us-gaap_ProfitLoss
Income attributable to noncontrolling interests	(2,003)	(1,230)
Net income attributable to the Company	22,236us-gaap_NetIncomeLoss	19,311us-gaap_NetIncomeLoss
Calculation of income for earnings per share:
Net income attributable to the Company	22,236us-gaap_NetIncomeLoss	19,311us-gaap_NetIncomeLoss
Decrease (increase) in noncontrolling interest redemption value	70	(8)
Net income attributable to participating securities	(100)	(137)
Net income attributable to common shareholders	22,206	19,166
Basic earnings per common share	$ 0.56us-gaap_EarningsPerShareBasic	$ 0.46us-gaap_EarningsPerShareBasic
Diluted earnings per common share	$ 0.55us-gaap_EarningsPerShareDiluted	$ 0.45us-gaap_EarningsPerShareDiluted
Basic weighted average common shares outstanding	39,827	41,778
Diluted weighted average common shares outstanding	40,510	42,696
Dividends declared per common share	$ 0.14	$ 0.125
International
Royalties and franchise and development fees	6,498	5,779
Restaurant and commissary sales	18,928	17,850
International restaurant and commissary expenses	15,478	14,885
Domestic market \| Domestic Company-owned restaurants
Total revenues	197,287	178,193
Cost of sales	47,504	45,156
Salaries and benefits	53,658	47,583
Advertising and related costs	16,770	16,256
Occupancy costs and other restaurant operating expenses	37,100	34,598
Total costs and expenses	155,032	143,593
Domestic market \| North America franchising
Franchise royalties	25,359	22,614
Franchise and development fees	265	144
Domestic market \| Domestic commissaries
Total revenues	162,333	164,047
Cost of sales	125,126	128,924
Salaries and benefits and other commissary operating expenses	24,610	22,879
Total costs and expenses	149,736	151,803
Domestic market \| All others
Total revenues	21,614	12,750
Other operating expenses	$ 20,603	$ 11,431

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