Retirement Savings Plans (Narrative) (Details) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
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| Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] | |||
| Liability to participants under deferred compensation plan | $ 26,600,000 | $ 20,500,000 | |
| Current liability to participants under deferred compensation plan | 1,200,000 | 700,000 | |
| 401(k) Profit-Sharing Plan [Member] | |||
| Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] | |||
| Company contributions to the plan | 15,600,000 | 13,300,000 | $ 10,700,000 |
| Other non-current assets: | Deferred Compensation Plan [Member] | |||
| Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] | |||
| Fair value of mutual fund investments | 26,600,000 | 20,500,000 | |
| Short-term investments: | Deferred Compensation Plan [Member] | |||
| Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] | |||
| Fair value of mutual fund investments | $ 1,200,000 | $ 700,000 | |
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- Definition Amount of contributions made by employer into fund established for purposes of making future disbursement to individual in accordance with deferred compensation arrangement. No definition available.
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements payable beyond one year (or the operating cycle, if longer). No definition available.
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- Definition Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements payable within one year (or the operating cycle, if longer). Represents currently earned compensation under compensation arrangements that is not actually paid until a later date. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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