Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019
Operating activities
Net income	$ 29,958	$ 19,254
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	28,728	28,802
Other	(98)	270
Changes in operating assets and liabilities, net of assets acquired:
Accounts receivable	(38,170)	(15,960)
Accounts payable and accrued expenses	10,563	(609)
Self-insurance reserve	8,498	1,690
Prepaid expenses	14,319	9,178
Other, net	3,761	1,661
Total changes in operating assets and liabilities	27,601	25,032
Net cash provided by operating activities	57,559	44,286
Capital expenditures:
Equipment	(31,239)	(37,192)
Land and buildings	1,105	229
Purchases of businesses, net of cash acquired and debt incurred	(1,826)	(3,030)
Proceeds from sales of fixed assets	1,949	1,634
Net cash used in investing activities	(32,221)	(38,817)
Financing activities
Revolving credit facility borrowings	396,500	264,500
Revolving credit facility payments	(375,500)	(278,500)
Purchase of common shares for treasury	(24,016)	(21,129)
Sale of common shares from treasury	13,978	12,486
Dividends paid	(1,138)	(1,170)
Proceeds from notes payable	66,021	51,073
Payments of notes payable	(79,881)	(38,587)
Payments of finance leases	(1,062)	(860)
Net cash used in financing activities	(5,098)	(12,187)
Effect of exchange rate changes on cash	(99)	114
Increase (Decrease) in cash	20,141	(6,604)
Cash, beginning of period	11,000	22,661
Cash, end of period	31,141	16,057
Supplemental cash flow information follows:
Interest Paid, Excluding Capitalized Interest, Operating Activities	3,987	4,523
Income taxes paid	$ 2,765	$ 827