Consolidating Guarantor Financial Information - Consolidating Statement of Cash Flows (Details) - USD ($) $ in Thousands		12 Months Ended
	Aug. 25, 2014	Dec. 29, 2019	Dec. 30, 2018	Dec. 31, 2017	Jan. 01, 2017
Cash flows provided by (used in) operating activities:
Cash flows provided by (used in) operating activities:		$ 111,142	$ 86,790	$ 104,297
Cash flows provided by (used in) investing activities:
Development of internal use software		(770)	(2,756)	(3,243)
Payments to Acquire Property, Plant, and Equipment		(87,018)	(77,088)	(90,958)
Proceeds from sale of property and equipment		204	560	489
Net cash used in investing activities		(87,584)	(79,284)	(93,712)
Cash flows from financing activities:
Repayments on senior term loan		(473,749)	(7,600)	(7,600)
Repayments of Notes Payable		0	0	(13)
Proceeds from sale leaseback transaction	$ 183,700	0	0	4,073
Repayments of Lines of Credit		(38,337)
Payment of debt financing costs		(15,375)	(442)	0
Payments on finance lease obligations		(697)	(595)	(467)
Proceeds from Issuance of Secured Debt		479,449
Proceeds from Issuance of Senior Long-term Debt		(473,749)
Payments on sale leaseback obligations		(3,379)	(2,910)	(2,470)
Return of capital		0	0	1,447
Net cash used in financing activities		(52,088)	(11,547)	(5,030)
Effect of foreign exchange rate changes on cash		(2)	50	466
Change in cash, cash equivalents and restricted cash		(28,532)	(3,991)	6,021
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents		34,789	63,321	67,312	$ 61,291
Reportable Legal Entities [Member]
Cash flows from financing activities:
Repayments of Lines of Credit		0
Proceeds from Issuance of Secured Debt		0
Proceeds from Issuance of Senior Long-term Debt		0
Reportable Legal Entities [Member] | Parent Company [Member]
Cash flows provided by (used in) operating activities:
Cash flows provided by (used in) operating activities:		107,867	68,828	73,925
Cash flows provided by (used in) investing activities:
Development of internal use software		(174)	(1,845)	0
Payments to Acquire Property, Plant, and Equipment		(80,476)	(61,178)	(62,544)
Proceeds from sale of property and equipment		204	560	489
Net cash used in investing activities		(80,446)	(62,463)	(62,055)
Cash flows from financing activities:
Repayments on senior term loan			(7,600)	(7,600)
Repayments of Notes Payable				0
Proceeds from sale leaseback transaction				4,073
Repayments of Lines of Credit		(38,337)
Payment of debt financing costs		(15,375)	(442)
Payments on finance lease obligations		(683)	(586)	(460)
Proceeds from Issuance of Secured Debt		479,449
Proceeds from Issuance of Senior Long-term Debt		(473,749)
Payments on sale leaseback obligations		(3,379)	(2,910)	(2,470)
Return of capital				1,447
Net cash used in financing activities		(52,074)	(11,538)	(5,010)
Effect of foreign exchange rate changes on cash		0	0	0
Change in cash, cash equivalents and restricted cash		(24,653)	(5,173)	6,860
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents		30,122	54,775	59,948	53,088
Reportable Legal Entities [Member] | Guarantor Subsidiaries [Member]
Cash flows provided by (used in) operating activities:
Cash flows provided by (used in) operating activities:		1,473	21,872	29,569
Cash flows provided by (used in) investing activities:
Development of internal use software		(596)	(911)	(3,243)
Payments to Acquire Property, Plant, and Equipment		(5,937)	(14,646)	(27,061)
Proceeds from sale of property and equipment		0	0	0
Net cash used in investing activities		(6,533)	(15,557)	(30,304)
Cash flows from financing activities:
Repayments on senior term loan			0	0
Repayments of Notes Payable				(13)
Proceeds from sale leaseback transaction				0
Repayments of Lines of Credit		0
Payment of debt financing costs		0
Payments on finance lease obligations		0	0	0
Proceeds from Issuance of Secured Debt		0
Proceeds from Issuance of Senior Long-term Debt		0
Payments on sale leaseback obligations		0	0	0
Return of capital				0
Net cash used in financing activities		0	0	(13)
Effect of foreign exchange rate changes on cash		0	0	0
Change in cash, cash equivalents and restricted cash		(5,060)	6,315	(748)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents		1,665	6,725	410	1,158
Reportable Legal Entities [Member] | Non-Guarantor Subsidiaries [Member]
Cash flows provided by (used in) operating activities:
Cash flows provided by (used in) operating activities:		1,802	(3,910)	803
Cash flows provided by (used in) investing activities:
Development of internal use software		0	0	0
Payments to Acquire Property, Plant, and Equipment		(605)	(1,264)	(1,353)
Proceeds from sale of property and equipment		0	0	0
Net cash used in investing activities		(605)	(1,264)	(1,353)
Cash flows from financing activities:
Repayments on senior term loan			0	0
Repayments of Notes Payable				0
Proceeds from sale leaseback transaction				0
Payment of debt financing costs		0
Payments on finance lease obligations		(14)	(9)	(7)
Payments on sale leaseback obligations		0	0	0
Return of capital				0
Net cash used in financing activities		(14)	(9)	(7)
Effect of foreign exchange rate changes on cash		(2)	50	466
Change in cash, cash equivalents and restricted cash		1,181	(5,133)	(91)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents		$ 3,002	$ 1,821	$ 6,954	$ 7,045