Segment Information - Equity in Net Income of Joint Ventures Reportable Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Segment Reporting Disclosure [Line Items]
Net income of equity method investments, excluding impairment	$ 3,666	$ 2,230
Other
Segment Reporting Disclosure [Line Items]
Net income of equity method investments, excluding impairment	384	653
Operating Segments
Segment Reporting Disclosure [Line Items]
Net income of equity method investments, excluding impairment	3,282	1,577
Operating Segments | Dunkin' Donuts | International
Segment Reporting Disclosure [Line Items]
Net income of equity method investments, excluding impairment	(125)	(140)
Operating Segments | Baskin-Robbins | International
Segment Reporting Disclosure [Line Items]
Net income of equity method investments, excluding impairment	$ 3,407	$ 1,717