Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2017	Apr. 02, 2016
Cash flows from operating activities:
Net income	$ 24,461	$ 12,969
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	16,205	13,854
Stock-based compensation	3,704	3,766
Net loss on disposals and impairments of assets	0	1
Excess tax benefits from stock-based compensation	0	(26)
Deferred income taxes	5,663	1,622
Changes in operating assets and liabilities:
Accounts receivable	1,478	8,816
Inventories	8,168	5,633
Income taxes	5,541	16,558
Prepaid expenses and other assets	2,880	(1,272)
Accounts payable	(1,394)	(495)
Customer prepayments	4,443	(20,537)
Accrued compensation and benefits	11,693	10,677
Other taxes and withholding	(903)	7,493
Other accruals and liabilities	4,930	4,922
Net cash provided by operating activities	86,869	63,981
Cash flows from investing activities:
Purchases of property and equipment	(13,211)	(12,289)
Proceeds from marketable debt securities	0	15,090
Proceeds from sales of property and equipment	0	14
Decrease in restricted cash	(3,150)	0
Net cash (used in) provided by investing activities	(10,061)	2,815
Cash flows from financing activities:
Repurchases of common stock	(54,794)	(51,240)
Net increase (decrease) in short-term borrowings	2,369	(6,661)
Proceeds from issuance of common stock	460	6
Excess tax benefits from stock-based compensation	0	26
Debt issuance costs	0	(401)
Net cash used in financing activities	(51,965)	(58,270)
Net increase in cash and cash equivalents	24,843	8,526
Cash and cash equivalents, at beginning of period	11,609	20,994
Cash and cash equivalents, at end of period	$ 36,452	$ 29,520