Statement of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Operating Activities
Earnings (loss)	$ (134,568)	$ (51,134)	$ (22,607)
Earnings (loss) from discontinued operations	0	(570)	(19,475)
Earnings (loss) from continuing operations	(134,568)	(50,564)	(3,132)
Items not affecting cash
Depreciation and amortization	32,824	34,150	21,007
Amortization of Debt Issuance Costs	2,825	11,301	5,895
Deferred income taxes	(27,899)	(29,850)	(4,038)
Stock-based compensation	5,709	4,148	4,366
Unrealized Loss (Gain) on Derivative Instruments	(631)	(547)	143
Fair Value Of Contingent Consideration	371	(1,158)	884
Impairment of long-lived assets	18,193	13,257	0
Goodwill impairment	115,000	17,540	0
Acquisition accounting adjustment on inventory sold	0	15,000	4,000
Other	9	335	990
Changes in non-cash working capital, net of business acquired	19,630	(12,891)	(3,685)
Net cash flows from operations - continuing operations	31,463	721	26,430
Net cash flows from operations - discontinued operations	0	758	4,814
Net Cash Provided by (Used in) Operating Activities, Total	31,463	1,479	31,244
Investing activities
Purchases of property, plant and equipment	(41,139)	(22,560)	(31,186)
Minority Interest Decrease From Redemptions	(1,737)	0	(733)
Proceeds from disposal of assets	2,385	254	1,138
Acquisition of businesses, net of cash acquired	0	0	(490,715)
Other	369	700	(89)
Net cash flows from investing activities - continuing operations	(40,122)	(21,606)	(521,585)
Net cash flows from investing activities - discontinued operations	0	1,754	(1,235)
Net Cash Provided by (Used in) Investing Activities, Total	(40,122)	(19,852)	(522,820)
Financing activities
Increase (decrease) under line of credit facilities	22,170	236,976	85,968
Repayment of Line of Credit Facilities	0	(192,677)	0
Borrowings under long term debt	5,176	231,430	330,135
Repayment of long-term debt	(9,959)	(322,004)	(11,018)
Issuance of Series A Preferred Stock, net	0	78,963	0
Payments Of Dividends	(6,691)	0	0
Payment of contingent consideration	(4,330)	(4,554)	(204)
Financing costs	(442)	(13,017)	(15,966)
Proceeds From Stock Options Exercised	5,034	1,486	3,884
Proceeds from issuance of common shares	0	0	94,080
Proceeds From Warrant Exercises	0	0	3,879
Other	(390)	168	(781)
Net cash flows from financing activities - continuing operations	10,568	16,771	489,977
Net cash flows from financing activities - discontinued operations	0	(1,180)	(4,304)
Net Cash Provided By (Used In) Financing Activities	10,568	15,591	485,673
Foreign exchange gain (loss) on cash held in a foreign currency	68	52	(54)
Increase (decrease) in cash and cash equivalents during the period	1,977	(2,730)	(5,957)
Discontinued operations cash activity included above:
Add: Balance included at beginning of period	0	1,707	2,170
Less: Balance included at end of period	0	0	1,707
Cash and cash equivalents - beginning of the period	1,251	2,274	7,768
Cash and cash equivalents - end of the period	3,228	1,251	2,274
Noncash Investing And Financing Items [Abstract]
Accrued Dividends	(1,700)	(1,590)	0
Proceeds of divestiture of business, note receivable	0	1,537	0
Acquistion of business, contingent consideration at fair value	0	0	20,330
Acquisition of business, working capital adjustment	0	0	82
Acquisition of business, settlement of pre-existing relationship	$ 0	$ 0	$ (749)