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Summary of Significant Accounting Policies and Basis of Presentation - Schedule of Computation of Basic and Diluted EPS For Continuing Operations (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						4 Months Ended		12 Months Ended
	Dec. 28, 2019	Oct. 05, 2019	Jul. 13, 2019	Dec. 29, 2018	Oct. 06, 2018	Jul. 14, 2018	Apr. 20, 2019	Apr. 21, 2018	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Numerator:
Earnings (loss) from continuing operations	$ 5,473	$ (310)	$ (6,767)	$ (14,027)	$ 17,545	$ 17,838	$ 7,521	$ 12,435	$ 5,917	$ 33,791	$ (52,617)
Adjustment for (earnings) loss attributable to participating securities									(149)	(746)	908
Earnings (loss) from continuing operations used in calculating earnings per share									$ 5,768	$ 33,045	$ (51,709)
Denominator:
Weighted average shares outstanding, including participating securities									36,271	36,012	37,419
Adjustment for participating securities									(912)	(795)	(646)
Shares used in calculating basic earnings per share									35,359	35,217	36,773
Effect of dilutive stock options										10
Shares used in calculating diluted earnings per share									35,359	35,227	36,773
Basic (loss) earnings per share from continuing operations	$ 0.15	$ (0.01)	$ (0.19)	$ (0.39)	$ 0.49	$ 0.50	$ 0.21	$ 0.34	$ 0.16	$ 0.94	$ (1.41)
Diluted (loss) earnings per share from continuing operations	$ 0.15	$ (0.01)	$ (0.19)	$ (0.39)	$ 0.49	$ 0.50	$ 0.21	$ 0.34	$ 0.16	$ 0.94	$ (1.41)

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