Segment Information - Equity in Net Income of Joint Ventures Reportable Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Segment Reporting Disclosure [Line Items]
Net income of equity method investments, excluding impairment	$ 4,427	$ 3,845	$ 6,657	$ 5,878
Other
Segment Reporting Disclosure [Line Items]
Net income of equity method investments, excluding impairment	649	859	1,302	1,609
Operating Segments
Segment Reporting Disclosure [Line Items]
Net income of equity method investments, excluding impairment	3,778	2,986	5,355	4,269
Operating Segments | Dunkin' Donuts | International
Segment Reporting Disclosure [Line Items]
Net income of equity method investments, excluding impairment	161	60	21	(384)
Operating Segments | Baskin-Robbins | International
Segment Reporting Disclosure [Line Items]
Net income of equity method investments, excluding impairment	$ 3,617	$ 2,926	$ 5,334	$ 4,653