Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019
Operating activities
Net income	$ 54,585	$ 32,688
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	42,553	44,121
Other	108	(1,106)
Changes in operating assets and liabilities, net of assets acquired:
Accounts receivable	(34,801)	(35,956)
Accounts payable and accrued expenses	28,389	18,691
Self-insurance reserve	14,424	5,952
Prepaid expenses	(7,506)	(10,388)
Other, net	1,676	3,212
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities, Total	44,843	24,526
Net cash provided by operating activities	99,428	57,214
Capital expenditures:
Equipment	(38,071)	(45,148)
Land and buildings	2,408	1,108
Purchases of businesses, net of cash acquired and debt incurred	(3,826)	(3,800)
Proceeds from sales of fixed assets	2,691	2,502
Net cash used in investing activities	(41,614)	(47,554)
Financing activities
Revolving credit facility borrowings	522,500	358,000
Revolving credit facility payments	(554,500)	(386,500)
Purchase of common shares for treasury	(27,489)	(25,435)
Sale of common shares from treasury	16,698	13,852
Dividends paid	(1,708)	(1,745)
Proceeds from notes payable	152,128	95,200
Payments of notes payable	(149,843)	(71,027)
Payments of finance leases	(1,525)	(1,061)
Net cash used in financing activities	(43,739)	(18,716)
Effect of exchange rate changes on cash	(17)	97
Increase (Decrease) in cash	14,058	(8,959)
Cash, beginning of period	11,000	22,661
Cash, end of period	25,058	13,702
Supplemental cash flow information follows:
Interest Paid, Excluding Capitalized Interest, Operating Activities	6,408	7,355
Income taxes paid	$ 17,055	$ 2,239