Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016
Operating Activities
Earnings (loss)	$ (102)	$ (4,001)	$ (11,286)	$ (13,850)
Earnings (loss) from discontinued operations	0	0	0	(570)
Earnings (loss) from continuing operations	(102)	(4,001)	(11,286)	(13,280)
Items not affecting cash
Depreciation and amortization	8,167	8,549	16,347	17,309
Amortization of Debt Issuance Costs	652	2,854	1,138	6,222
Deferred income taxes	(3,823)	(10,821)	(9,915)	(14,508)
Stock-based compensation	1,286	953	2,138	1,992
Unrealized Loss (Gain) on Derivatives Instrument	(1,267)	(306)	(1,229)	(515)
Gain (loss) on sale of assets	0	0	0	0
Fair Value of Contingent Consideration	204	(1,603)	204	(1,405)
Impairment of long-lived assets	0	0	3,723	1,735
Acquisition accounting adjustment on inventory sold	0	3,888	0	11,514
Other	(244)	367	(101)	407
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Inventory	0	3,888	0	11,514
Changes in non-cash working capital, net of business acquired	(30,648)	(34,294)	(7,313)	(61,779)
Net cash flows from operations - continuing operations	(25,775)	(34,414)	(6,294)	(52,308)
Net cash flows from operations - discontinued operations	0	0	0	758
Net Cash Provided by (Used in) Operating Activities, Total	(25,775)	(34,414)	(6,294)	(51,550)
Investing activities
Purchases of property, plant and equipment	(7,143)	(4,793)	(16,167)	(9,340)
Proceeds from sale of assets	51	0	301	0
Other	254	700	364	700
Net cash flows from investing activities - continuing operations	(6,838)	(4,093)	(15,502)	(8,640)
Net cash flows from investing activities - discontinued operations	0	1,945	0	1,754
Net cash flows from investing activities	(6,838)	(2,148)	(15,502)	(6,886)
Financing activities
Increase (decrease) under line of credit facilities	36,690	39,029	29,349	271,572
Repayment of line of credit facilities	0	0	0	(192,677)
Borrowings under long term debt	0	0	0	432
Repayment of long-term debt	(589)	(523)	(1,116)	(11,009)
Payments Of Dividends	(1,700)	0	(3,291)	0
Proceeds From Stock Options Exercised	2,535	575	3,629	687
Payment of contingent consideration	(4,330)	(4,554)	(4,330)	(4,554)
Financing costs	0	(256)	0	(4,366)
Other	(101)	(119)	(303)	(134)
Net cash flows from financing activities - continuing operations	32,505	34,152	23,938	59,951
Cash Provided By Used In Financing Activities Discontinued Operations	0	0	0	(1,180)
Net Cash Provided By (Used In) Financing Activities	32,505	34,152	23,938	58,771
Foreign exchange gain (loss) on cash held in a foreign currency	54	(61)	64	(24)
Increase (decrease) in cash and cash equivalents during the period	(54)	(2,471)	2,206	311
Discontinued operations cash activity included above:
Add: Balance included at beginning of period	0	1,288	0	1,707
Less: Balance included at end of period	0	0	0	0
Cash and cash equivalents - beginning of the period	3,511	5,475	1,251	2,274
Cash and cash equivalents - end of the period	3,457	4,292	3,457	4,292
Noncash Investing And Financing Items [Abstract]
Dividends Payable	(1,700)	0	(1,700)	0
Proceeds of divestiture of business, note receivable	$ 0	$ 1,537	$ 0	$ 1,537