Revenue Recognition and Contracts with Customers - Revenue Recognition (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 02, 2021	Oct. 03, 2020	Jul. 04, 2020	Apr. 04, 2020	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Net sales	$ 221,601	$ 238,033	$ 202,783	$ 220,204	$ 174,826	$ 197,823	$ 198,570	$ 173,737	$ 882,621	$ 744,956	$ 698,493
Cost of sales									561,297	484,588	455,025
Gross profit	78,798	86,936	74,463	81,127	56,163	69,995	72,940	61,270	321,324	260,368	243,468
Selling, general and administrative expenses									224,386	176,312	150,910
Gains on sales of assets											(2,551)
Income from operations									84,711	84,056	95,109
Interest expense, net									27,719	26,417	26,529
Debt extinguishment costs										1,512	3,375
Income before income taxes									56,992	56,127	65,205
Income tax expense									11,884	12,439	11,272
Net income	$ 9,987	$ 17,322	$ 2,199	$ 15,600	$ 3,280	$ 15,106	$ 17,045	$ 8,257	$ 45,108	$ 43,688	$ 53,933
Basic	$ 0.17	$ 0.29	$ 0.04	$ 0.27	$ 0.06	$ 0.26	$ 0.29	$ 0.14	$ 0.77	$ 0.75	$ 1.03
Diluted	$ 0.17	$ 0.29	$ 0.04	$ 0.26	$ 0.06	$ 0.26	$ 0.29	$ 0.14	$ 0.76	$ 0.74	$ 1.00
Other comprehensive income (loss) before tax:
Change in fair value of derivatives									$ 1,569	$ (1,229)	$ (4,357)
Reclassification to earnings									2,359	5,030	239
Other comprehensive income (loss) before tax									3,928	3,801	(4,118)
Income tax benefit related to other comprehensive loss									970	974	(1,053)
Other comprehensive income (loss), net of tax									2,958	2,827	(3,065)
Comprehensive income									$ 48,066	$ 46,515	50,868
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Net sales											2,553
Cost of sales											1,875
Gross profit											678
Selling, general and administrative expenses											104
Income from operations											574
Income before income taxes											574
Income tax expense											146
Net income											428
Other comprehensive income (loss) before tax:
Comprehensive income											428
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Net sales											701,046
Cost of sales											456,900
Gross profit											244,146
Selling, general and administrative expenses											151,014
Gains on sales of assets											(2,551)
Income from operations											95,683
Interest expense, net											26,529
Debt extinguishment costs											3,375
Income before income taxes											65,779
Income tax expense											11,418
Net income											$ 54,361
Basic											$ 1.04
Diluted											$ 1.00
Other comprehensive income (loss) before tax:
Change in fair value of derivatives											$ (4,357)
Reclassification to earnings											239
Other comprehensive income (loss) before tax											(4,118)
Income tax benefit related to other comprehensive loss											(1,053)
Other comprehensive income (loss), net of tax											(3,065)
Comprehensive income											$ 51,296