Stockholders' Equity Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017	Dec. 31, 2017
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period	$ 573,203	$ 527,736
Comprehensive income	14,232	24,827
Cash dividends	(20,355)	(17,273)
Repurchases of common stock	(39,407)	(17,823)
Share-based compensation	4,458	3,559
Exercises of stock options	3,578	4,418
Vesting of restricted shares	(2,550)	(2,518)
Cumulative Effect of New Accounting Principle in Period of Adoption	(70,210)	1,880
Other	48	43
Balance at end of period	462,997	$ 524,849
Deferred franchise fees	92,727		$ 10,881
Deferred income taxes	267,156		299,053
Advertising funds restricted liabilities	100,646		$ 62,602
Revenue recognition guidance
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative Effect of New Accounting Principle in Period of Adoption	(70,210)
Deferred franchise fees	(85,561)
Deferred income taxes	21,996
Advertising funds restricted liabilities	$ (6,645)