Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Cash flows from operating activities:
Net income	$ 85,300	$ 87,992	$ 50,964
Adjustments to reconcile net income to net cash provided by operating activities, net of the effects of acquisitions:
Depreciation and amortization	37,159	36,574	25,499
Gain on sale of equity investment	(8,439)	0	0
Gain on business acquisition	0	0	(2,243)
Stock-based compensation	23,744	25,804	19,751
Deferred income taxes, net	(11,118)	(10,848)	(999)
Other	7,267	1,837	864
Changes in operating assets and liabilities — (use) source
Accounts receivable	13,064	(23,920)	(53,251)
Inventory	7,307	(58,546)	(1,470)
Other assets	(3,310)	(8,533)	(10,562)
Accounts payable	(20,536)	22,470	17,457
Accrued expenses and other liabilities	(386)	(1,145)	30,305
Net cash provided by operating activities	130,052	71,685	76,315
Cash flows from investing activities:
Additions of property and equipment	(35,337)	(32,422)	(23,371)
Change in other assets	(5,436)	(2,363)	(1,542)
Proceeds from sale of equity investments	9,787	856	1,267
Cash paid for business acquisitions, net of cash acquired	(2,817)	0	(148,765)
Purchases of investments	0	(6,438)	(10,578)
Sales and maturities of investments	12,880	14,000	13,066
Net cash used in investing activities	(20,923)	(26,367)	(169,923)
Cash flows from financing activities:
Proceeds from employee stock plans	7,147	10,366	10,573
Income tax withholding payment associated with restricted stock vesting	(7,277)	(3,532)	(2,983)
Stock repurchases	0	(50,000)	0
Net cash (used in) provided by financing activities	(130)	(43,166)	7,590
Effect of exchange rate changes on cash and cash equivalents	20	(414)	130
Net increase (decrease) in cash and cash equivalents	109,019	1,738	(85,888)
Cash and cash equivalents, at beginning of period	130,373	128,635	214,523
Cash and cash equivalents, at end of period	239,392	130,373	128,635
Supplemental disclosure of cash flow information
Cash paid for income taxes	$ 22,582	$ 39,517	$ 25,879