Stock-Based Compensation (Summary of Stock Option Activity) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Stock-Based Compensation [Abstract]
Number of Shares, Outstanding	1,340,000	1,673,000	1,899,000
Number of Shares, Granted	0	20,000	10,000
Number of Shares, Exercised	(250,000)	(339,000)	(233,000)
Number of Shares, Forfeited/canceled	(2,000)	(14,000)	(3,000)
Number of Shares, Outstanding	1,088,000	1,340,000	1,673,000
Number of Shares, Exercisable	1,066,000
Number of Shares, Unvested	22,000
Weighted-Average Exercise Price Per Share, Outstanding	$ 168.32	$ 161.02	$ 157.76
Weighted-Average Exercise Price Per Share, Granted		224.24	328.99
Weighted-Average Exercise Price Per Share, Exercised	140.18	132.70	141.41
Weighted-Average Exercise Price Per Share, Forfeited/canceled	197.91	238.10	179.16
Weighted-Average Exercise Price Per Share, Outstanding	174.74	$ 168.32	$ 161.02
Weighted-Average Exercise Price Per Share, Exercisable	173.12
Weighted-Average Exercise Price Per Share, Unvested	$ 252.81
Weighted-Average Remaining Contractual Life (in years), Outstanding	1 year 1 month 6 days
Weighted-Average Remaining Contractual Life (in years), Exercisable	1 year
Weighted-Average Remaining Contractual Life (in years), Unvested	8 years 1 month 6 days
Aggregate Intrinsic Value, Outstanding	$ 33,420
Aggregate Intrinsic Value, Exercisable	$ 33,420

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Gross number of share options (or share units) granted during the period.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of non-vested options outstanding.

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Weighted average grant-date fair value of non-vested options outstanding.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Number of share options (or share units) exercised during the current period.

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