Statement of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Operating Activities
Earnings (loss)	$ (109,143)	$ (134,568)	$ (51,134)
Earnings (loss) from discontinued operations	0	0	(570)
Earnings (loss) from continuing operations	(109,143)	(134,568)	(50,564)
Items not affecting cash
Depreciation and amortization	32,788	32,824	34,150
Amortization of debt issuance costs	2,536	2,825	11,301
Deferred income taxes	(7,390)	(27,899)	(29,850)
Stock-based compensation	7,939	5,709	4,148
Unrealized loss (gain) on derivative instruments	465	(631)	(547)
Goodwill impairment	81,222	115,000	17,540
Impairment of long-lived assets	409	18,193	13,257
Fair value of contingent consideration	(2,635)	371	(1,158)
Reserve for notes receivable	2,232	0	0
Acquisition accounting adjustment on inventory sold	0	0	15,000
Other	(197)	9	335
Changes in non-cash working capital	(19,367)	19,630	(12,891)
Net cash flows from operations - continuing operations	(11,141)	31,463	721
Net cash flows from operations - discontinued operations	0	0	758
Net Cash Provided by (Used in) Operating Activities, Total	(11,141)	31,463	1,479
Investing activities
Purchases of property, plant and equipment	(31,603)	(41,139)	(22,560)
Minority interest decrease from redemptions	0	(1,737)	0
Proceeds from sale of assets	1,437	2,385	254
Payments received on note from sale of business	1,236	307	0
Other	159	62	700
Net cash flows from investing activities - continuing operations	(28,771)	(40,122)	(21,606)
Net cash flows from investing activities - discontinued operations	0	0	1,754
Net Cash Provided by (Used in) Investing Activities, Total	(28,771)	(40,122)	(19,852)
Financing activities
Increase (decrease) under line of credit facilities	50,275	22,170	236,976
Repayment of line of credit facilities	0	0	(192,677)
Borrowings under long-term debt	2,029	5,176	231,430
Repayment of long-term debt	(1,810)	(9,959)	(322,004)
Payment of cash dividends on Series A Preferred Stock	(6,800)	(6,691)	0
Issuance of Series A Preferred Stock, net	0	0	78,963
Payment of contingent consideration	(4,399)	(4,330)	(4,554)
Proceeds from issuance of common shares	1,309	5,034	1,486
Dividends paid by subsidiary to non-controlling interest	(278)	0	0
Payment of debt issuance costs	0	(442)	(13,017)
Other	(292)	(390)	168
Net cash flows from financing activities - continuing operations	40,034	10,568	16,771
Net cash flows from financing activities - discontinued operations	0	0	(1,180)
Net Cash Provided By (Used In) Financing Activities	40,034	10,568	15,591
Foreign exchange gain (loss) on cash held in a foreign currency	(70)	68	52
Increase (decrease) in cash and cash equivalents during the period	52	1,977	(2,730)
Discontinued operations cash activity included above:
Add: Balance included at beginning of period	0	0	1,707
Less: Balance included at end of period	0	0	0
Cash and cash equivalents - beginning of the period	3,228	1,251	2,274
Cash and cash equivalents - end of the period	3,280	3,228	1,251
Noncash Investing And Financing Items [Abstract]
Accrued cash dividends on Class A Preferred Stock	(1,700)	(1,700)	(1,590)
Proceeds on disposition of discontinued operation, note receivable	$ 0	$ 0	$ 1,537