Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Operating activities
Net income (loss)	$ 173	$ (493)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	14,604	14,212
Other	810	152
Changes in operating assets and liabilities, net of assets acquired:
Accounts receivable	(17,161)	1,934
Accounts payable and accrued expenses	(7,532)	(12,777)
Self-insurance reserve	4,408	(1,265)
Prepaid expenses	8,176	3,815
Other, net	(710)	5,850
Total changes in operating assets and liabilities	2,595	11,921
Net cash provided by operating activities	2,768	11,428
Capital expenditures:
Equipment	(18,960)	(22,660)
Land and buildings	747	150
Purchases of businesses, net of cash acquired	(1,826)	(2,916)
Proceeds from sales of fixed assets	521	749
Net cash used in investing activities	(21,012)	(24,977)
Financing activities
Revolving credit facility borrowings	244,500	174,000
Revolving credit facility payments	(163,500)	(178,000)
Purchase of common shares for treasury	(8,061)	(4,430)
Sale of common shares from treasury	5,216	4,633
Dividends paid	(575)	(590)
Proceeds from notes payable	27,166	33,152
Payments of notes payable	(29,866)	(10,482)
Payments of finance leases	(707)	(719)
Net cash provided by financing activities	74,173	17,564
Effect of exchange rate changes on cash	(100)	(12)
Increase in cash	55,829	4,003
Cash, beginning of period	11,000	22,661
Cash, end of period	66,829	26,664
Supplemental cash flow information follows:
Interest Paid, Excluding Capitalized Interest, Operating Activities	2,707	2,938
Income taxes paid	$ 1,910	$ 137