Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2024

Allowance for Doubtful Accounts Rollforward

The changes in the allowance for doubtful accounts during the years ended December 31, 2024, 2023 and 2022 were as follows:

(in thousands)	2024		2023		2022
Beginning balance – January 1	$	20,700	$	18,300	$	14,600
Additions: Charges to expense	2,598		$	2,704	6,222
Deductions: Write-offs	(6,798)		(304)		(2,522)
Ending balance – December 31	$	16,500	$	20,700	$	18,300

Basic And Diluted Earnings Per Share

The details of basic and diluted EPS are as follows:

	Year Ended December 31,
(in thousands, except per share data)	2024		2023		2022
Net income	$	575,692	$	500,412	$	523,710
Weighted average shares outstanding – basic	87,313		86,833		87,051
Dilutive effect of stock plans	582		553		439
Weighted average shares outstanding – diluted	87,895		87,386		87,490
Basic earnings per share	$	6.59	$	5.76	$	6.02
Diluted earnings per share	$	6.55	$	5.73	$	5.99
Anti-dilutive shares	43		218		300

Customer Concentration Risk

Schedule Of Risk Concentration

The following table outlines concentrations of risk with respect to our revenue:

	Year Ended December 31,
(as a % of revenue)	2024		2023		2022
Revenue from channel partners	25	%	26	%	24	%

Credit Concentration Risk

Schedule Of Risk Concentration

The following table outlines concentrations of risk with respect to our cash, cash equivalents and short-term investments:

	As of December 31,
(in thousands)	2024		2023
Cash, cash equivalents and short-term investments held domestically	$	1,052,003	$	529,092
Cash, cash equivalents and short-term investments held by foreign subsidiaries	445,514		331,298
Cash and cash equivalents held in excess of deposit insurance, foreign and domestic	1,434,694		846,723
Largest balance of cash and cash equivalents held with one financial institution, foreign and domestic	720,577		359,362