Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jul. 02, 2023
Cash flows from operating activities:
Net income	$ 48,234	$ 83,089
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Stock-based compensation expense	26,266	29,153
Depreciation of property, plant, and equipment	10,472	8,177
(Gain) loss on disposal of property, plant, and equipment	0	(8)
Amortization of intangible assets	5,540	1,685
Excess and obsolete inventory charges	1,343	1,443
Fair value adjustment on acquired inventories (Note 18)	1,224	0
Amortization of discounts or premiums on investments	562	1,200
Realized (gain) loss on sale of investments	8	0
Change in deferred income taxes	(7,538)	(14,158)
Accounts receivable	(47,784)	(24,420)
Unbilled revenue	527	(104)
Inventories	1,145	(4,981)
Prepaid expenses and other current assets	(6,590)	(5,289)
Accounts payable	2,786	(989)
Accrued expenses	6,234	(9,219)
Accrued income taxes	(14,305)	(13,684)
Deferred revenue and customer deposits	9,374	3,160
Other	3,908	2,347
Net cash provided by (used in) operating activities	41,406	57,402
Cash flows from investing activities:
Purchases of investments	(269,860)	(94,060)
Maturities and sales of investments	266,090	115,761
Purchases of property, plant, and equipment	(8,571)	(10,207)
Net payments related to business acquisitions (Note 18)	(1,444)	0
Net cash provided by (used in) investing activities	(13,785)	11,494
Cash flows from financing activities:
Net payments from issuance of common stock under stock plans	(1,871)	2,655
Repurchase of common stock	(19,879)	(49,163)
Payment of dividends	(25,756)	(24,160)
Net cash provided by (used in) financing activities	(47,506)	(70,668)
Effect of foreign exchange rate changes on cash and cash equivalents	(6,144)	(2,117)
Net change in cash and cash equivalents	(26,029)	(3,889)
Cash and cash equivalents at beginning of period	202,655	181,374
Cash and cash equivalents at end of period	$ 176,626	$ 177,485