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Cash, cash equivalents and restricted cash, at Carrying Value

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Sale Leaseback Transaction, Payments, Financing Activities

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount of increase (decrease) in cash, cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including effect from exchange rate change. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount of increase (decrease) from the effect of exchange rate changes on cash and cash equivalent balances held in foreign currencies.

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Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.

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Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.

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Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

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The cash outflow for loan and debt issuance costs.

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The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

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The cash outflow associated with the development or modification of software programs or applications for internal use (that is, not to be sold, leased or otherwise marketed to others) that qualify for capitalization.

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The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

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The cash outflow for the obligation for a lease meeting the criteria for capitalization (with maturities exceeding one year or beyond the operating cycle of the entity, if longer).

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The cash outflow for a long-term debt where the holder has highest claim on the entity's asset in case of bankruptcy or liquidation during the period.

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Condensed Consolidating Schedules - Cash Flow (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jul. 01, 2018	Jun. 30, 2019	Jul. 01, 2018	Dec. 30, 2018	Dec. 31, 2017
Condensed Financial Statements, Captions [Line Items]
Cash, cash equivalents and restricted cash, at Carrying Value	$ 113,818	$ 89,094	$ 113,818	$ 89,094		$ 67,312
Transaction and severance costs	8	191	31	725
Cash flows provided by (used in) operating activities:
Net Cash Provided by (Used in) Operating Activities			91,072	65,025
Cash flows provided by (used in) investing activities:
Proceeds from sale of property and equipment			(34,342)	(36,808)
Proceeds from Sale of Property, Plant, and Equipment			141	412
Payments to Develop Software			(609)	(1,022)
Net cash used in investing activities			(34,810)	(37,418)
Repayments on senior term loan			(3,800)	(3,800)
Cash flows from financing activities:
Payments of Financing Costs			0	395
Repayments of Long-term Capital Lease Obligations			(344)	(295)
Sale Leaseback Transaction, Payments, Financing Activities			(1,619)	(1,384)
Net cash used in financing activities			(5,763)	(5,874)
Effect of foreign exchange rate changes on cash			(2)	49
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect			50,497
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	113,818	89,094	113,818	89,094	$ 63,321	67,312
Guarantors
Condensed Financial Statements, Captions [Line Items]
Cash, cash equivalents and restricted cash, at Carrying Value	7,236	1,884	7,236	1,884		410
Transaction and severance costs	0	45	0	266
Cash flows provided by (used in) operating activities:
Net Cash Provided by (Used in) Operating Activities			8,563	14,473
Cash flows provided by (used in) investing activities:
Proceeds from sale of property and equipment			(7,625)	(12,792)
Proceeds from Sale of Property, Plant, and Equipment			0	(158)
Payments to Develop Software			(427)	(49)
Net cash used in investing activities			(8,052)	(12,999)
Repayments on senior term loan			0	0
Cash flows from financing activities:
Payments of Financing Costs				0
Repayments of Long-term Capital Lease Obligations			0	0
Sale Leaseback Transaction, Payments, Financing Activities			0	0
Net cash used in financing activities			0	0
Effect of foreign exchange rate changes on cash			0	0
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect			511
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents					6,725
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Cash, cash equivalents and restricted cash, at Carrying Value	2,403	976	2,403	976		6,954
Transaction and severance costs	0	0	0	0
Cash flows provided by (used in) operating activities:
Net Cash Provided by (Used in) Operating Activities			926	(4,883)
Cash flows provided by (used in) investing activities:
Proceeds from sale of property and equipment			(336)	(1,140)
Proceeds from Sale of Property, Plant, and Equipment			0	0
Payments to Develop Software			0	0
Net cash used in investing activities			(336)	(1,140)
Repayments on senior term loan			0	0
Cash flows from financing activities:
Payments of Financing Costs				0
Repayments of Long-term Capital Lease Obligations			(6)	(4)
Sale Leaseback Transaction, Payments, Financing Activities			0	0
Net cash used in financing activities			(6)	(4)
Effect of foreign exchange rate changes on cash			(2)	49
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect			582
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents					1,821
Issuer
Condensed Financial Statements, Captions [Line Items]
Cash, cash equivalents and restricted cash, at Carrying Value	104,179	86,234	104,179	86,234		$ 59,948
Transaction and severance costs	8	146	31	459
Cash flows provided by (used in) operating activities:
Net Cash Provided by (Used in) Operating Activities			81,583	55,435
Cash flows provided by (used in) investing activities:
Proceeds from sale of property and equipment			(26,381)	(22,876)
Proceeds from Sale of Property, Plant, and Equipment			141	570
Payments to Develop Software			(182)	(973)
Net cash used in investing activities			(26,422)	(23,279)
Repayments on senior term loan			(3,800)	(3,800)
Cash flows from financing activities:
Payments of Financing Costs				395
Repayments of Long-term Capital Lease Obligations			(338)	(291)
Sale Leaseback Transaction, Payments, Financing Activities			(1,619)	(1,384)
Net cash used in financing activities			(5,757)	(5,870)
Effect of foreign exchange rate changes on cash			0	0
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect			49,404
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents					$ 54,775
Consolidation, Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Transaction and severance costs	$ 0	$ 0	$ 0	$ 0