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Fair Value Measurements (Schedule Of Assets And Liabilities Carried At Fair Value Measured On A Recurring Basis) (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024 | Sep. 30, 2024
--- | --- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Restricted cash |  | $ 1,200 | $ 800 | $ 1,300
Fair Value, Recurring [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash and cash equivalents | [1] | 655,104 | 1,339,550 |
Deferred compensation plan assets | [2] | 72,993 | 61,242 |
Restricted cash | [3] | 1,213 | 845 |
Total |  | 729,310 | 1,401,637 |
Fair Value, Recurring [Member] | Level 1 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash and cash equivalents | [1] | 655,104 | 1,339,550 |
Deferred compensation plan assets | [2] | 72,993 | 61,242 |
Restricted cash | [3] | 1,213 | 845 |
Total |  | 729,310 | 1,401,637 |
Fair Value, Recurring [Member] | Level 2 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash and cash equivalents | [1] | 0 | 0 |
Deferred compensation plan assets | [2] | 0 | 0 |
Restricted cash | [3] | 0 | 0 |
Total |  | 0 | 0 |
Fair Value, Recurring [Member] | Level 3 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash and cash equivalents | [1] | 0 | 0 |
Deferred compensation plan assets | [2] | 0 | 0 |
Restricted cash | [3] | 0 | 0 |
Total |  | 0 | 0 |
Money Market Funds [Member] | Fair Value, Recurring [Member] | Level 1 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash and cash equivalents |  | $ 464,600 | $ 1,088,000 |
[1] | Cash and cash equivalents consist of deposit accounts and money market funds with original maturity dates of three months or less, which are Level 1 assets. At September 30, 2025 and December 31, 2024, we had $464.6 million and $1,088.0 million, respectively, in money market funds. From time to time, we have cash balances in certain of our domestic bank accounts that exceed federally insured limits.
[2] | Deferred compensation plan assets are classified as “Other assets” in the Consolidated Balance Sheets.
[3] | Restricted cash is classified as “Assets held for sale” in the Consolidated Balance Sheet as of September 30, 2025 and as “Prepaid expenses and other” in the Consolidated Balance Sheet as of December 31, 2024. Restricted cash represents cash held in account for use on customer contracts.

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