Condensed Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019
Cash flows from operating activities:
Net income	$ 26,510	$ 29,698
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	30,811	31,187
Stock-based compensation	7,084	7,888
Net loss (gain) on disposals and impairments of assets	224	(431)
Deferred income taxes	4,383	721
Changes in operating assets and liabilities:
Accounts receivable	4,224	5,214
Inventories	5,391	(2,977)
Income taxes	2,508	(9,195)
Prepaid expenses and other assets	7,018	(8,580)
Accounts payable	(14,804)	12,408
Customer prepayments	16,987	3,407
Accrued compensation and benefits	(7,405)	2,348
Other taxes and withholding	(3,594)	(1,836)
Other accruals and liabilities	7,664	495
Net cash provided by operating activities	87,001	70,347
Cash flows from investing activities:
Purchases of property and equipment	(21,695)	(33,896)
Proceeds from sales of property and equipment	25	2,571
Purchase of intangible assets	(945)	0
Net cash used in investing activities	(22,615)	(31,325)
Cash flows from financing activities:
Repurchases of common stock	(41,774)	(99,684)
Net (decrease) increase in short-term borrowings	(26,364)	56,758
Proceeds from issuance of common stock	4,100	4,995
Debt issuance costs	(290)	(1,019)
Net cash used in financing activities	(64,328)	(38,950)
Net increase in cash and cash equivalents	58	72
Cash and cash equivalents, at beginning of period	1,593	1,612
Cash and cash equivalents, at end of period	$ 1,651	$ 1,684