Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Apr. 02, 2021	Mar. 29, 2020	Dec. 31, 2020
Cash Flows from Operating Activities:
Net income	$ 53,363	$ 15,601
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation expense from property, plant and equipment and financing leases	37,716	37,799
Amortization of intangible assets and deferred proceeds, net	5,810	5,760
Deferred income taxes	19,980	5,910
Fair value adjustment of acquisition related contingent consideration	10,998	712
Loss on sale of property, plant and equipment	1,098	491
Impairment of property, plant and equipment	500	0
Amortization of debt costs	277	220
Change in current assets less current liabilities	(38,662)	(42,310)
Change in other noncurrent assets	4,197	12,223
Change in other noncurrent liabilities	(13,330)	(4,117)
Other	(37)	0
Total adjustments	28,547	16,688
Net cash provided by operating activities	81,910	32,289
Cash Flows from Investing Activities:
Additions to property, plant and equipment	(37,204)	(33,093)
Other distribution agreements	(1,998)	0
Investment in CONA Services LLC	(514)	(893)
Proceeds from the sale of property, plant and equipment	74	1,658
Net cash used in investing activities	(39,642)	(32,328)
Cash Flows from Financing Activities:
Borrowings under revolving credit facility	0	185,000
Payments on revolving credit facility	0	(125,000)
Payments on term loan facility	(31,250)	(7,500)
Payments of acquisition related contingent consideration	(10,046)	(10,452)
Cash dividends paid	(2,343)	(2,344)
Payments on financing lease obligations	(1,447)	(1,485)
Debt issuance fees	(147)	(46)
Net cash provided by (used in) financing activities	(45,233)	38,173
Net increase (decrease) in cash during period	(2,965)	38,134
Cash at beginning of period	54,793	9,614	$ 9,614
Cash at end of period	51,828	47,748	$ 54,793
Significant non-cash investing and financing activities:
Additions to property, plant and equipment accrued and recorded in accounts payable, trade	16,192	12,748
Right-of-use assets obtained in exchange for operating lease obligations	$ 0	$ 31,691