CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Cash flows from operating activities:
Net income	$ 106,171	$ 113,234	$ 215,525
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation expense	52,443	54,768	54,505
Depreciation of property, plant, and equipment	21,271	17,270	16,347
Loss (gain) on disposal of property, plant, and equipment	88	229	19
Amortization of intangible assets	11,418	4,610	3,274
Non-cash, loss from catastrophes	0	0	46,372
Excess and obsolete inventory charges	2,505	3,775	3,084
Fair value adjustment on acquired inventories (Note 21)	1,224	2,829	0
Amortization of discounts or premiums on investments	306	1,745	4,968
Realized (gain) loss on sale of investments	8	1,954	182
Change in deferred income taxes	(21,507)	(19,779)	(27,338)
Accounts receivable	(32,128)	23,346	3,454
Unbilled revenue	(693)	(255)	1,806
Inventories	(1,253)	(22,591)	(48,934)
Prepaid expenses and other current assets	1,514	2,469	(6,998)
Accounts payable	18,352	(13,744)	(17,277)
Accrued expenses	2,916	(35,309)	2,056
Accrued income taxes	(9,278)	(16,745)	(444)
Deferred revenue and customer deposits	(6,216)	(9,122)	4,886
Other	1,940	4,232	(12,081)
Net cash provided by operating activities	149,081	112,916	243,406
Cash flows from investing activities:
Purchases of investments	(850,852)	(184,056)	(233,720)
Maturities and sales of investments	828,370	496,462	253,983
Purchases of property, plant, and equipment	(15,043)	(23,077)	(19,667)
Net payments related to business acquisitions (Note 21)	(1,444)	(257,056)	(5,050)
Net cash provided by (used in) investing activities	(38,969)	32,273	(4,454)
Cash flows from financing activities:
Net payments from issuance of common stock under stock plans	994	3,268	9,861
Repurchase of common stock	(67,085)	(79,794)	(204,314)
Payment of dividends	(52,329)	(49,079)	(45,921)
Net cash used in financing activities	(118,420)	(125,605)	(240,374)
Effect of foreign exchange rate changes on cash and cash equivalents	(8,253)	1,697	(3,365)
Net change in cash and cash equivalents	(16,561)	21,281	(4,787)
Cash and cash equivalents at beginning of year	202,655	181,374	186,161
Cash and cash equivalents at end of year	$ 186,094	$ 202,655	$ 181,374