Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net income	$ 42,549	$ 49,286
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	46,655	46,000
Stock-based compensation	10,098	11,809
Net (gain) loss on disposals and impairments of assets	(17)	229
Deferred income taxes	7,263	3,729
Changes in operating assets and liabilities:
Accounts receivable	(4,816)	(1,402)
Inventories	(6,682)	(4,191)
Income taxes	(13,777)	(147)
Prepaid expenses and other assets	5,195	(1,713)
Accounts payable	26,007	33,325
Customer prepayments	18,351	13,722
Accrued compensation and benefits	(2,685)	15,277
Other taxes and withholding	4,265	758
Other accruals and liabilities	2,044	9,372
Net cash provided by operating activities	134,450	176,054
Cash flows from investing activities:
Purchases of property and equipment	(34,012)	(37,613)
Proceeds from sales of property and equipment	174	36
Net cash used in investing activities	(33,838)	(37,577)
Cash flows from financing activities:
Repurchases of common stock	(198,239)	(120,158)
Net increase in short-term borrowings	94,147	(6,194)
Proceeds from issuance of common stock	2,084	3,040
Debt issuance costs	(1,014)	(10)
Net cash used in financing activities	(103,022)	(123,322)
Net (decrease) increase in cash, cash equivalents and restricted cash	(2,410)	15,155
Cash, cash equivalents and restricted cash, at beginning of period	3,651	14,759
Cash, cash equivalents and restricted cash, at end of period	$ 1,241	$ 29,914