Stock-Based Compensation (Summary of Stock Option Activity) (Details) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
Mar. 31, 2024 USD ($) $ / shares shares
Stock-Based Compensation [Abstract]
Number of Shares, Outstanding \| shares	1,340
Number of Shares, Exercised \| shares	(153)
Number of Shares, Outstanding \| shares	1,187
Number of Shares, Exercisable \| shares	1,161
Number of Shares, Unvested \| shares	26
Weighted-Average Exercise Price Per Share, Outstanding \| $ / shares	$ 168.32
Weighted-Average Exercise Price Per Share, Exercised \| $ / shares	125.67
Weighted-Average Exercise Price Per Share, Outstanding \| $ / shares	173.82
Weighted-Average Exercise Price Per Share, Exercisable \| $ / shares	172.14
Weighted-Average Exercise Price Per Share, Unvested \| $ / shares	$ 248.41
Weighted-Average Remaining Contractual Life (in years), Outstanding	1 year 8 months 12 days
Weighted-Average Remaining Contractual Life (in years), Exercisable	1 year 6 months
Weighted-Average Remaining Contractual Life (in years), Unvested	8 years 10 months 24 days
Aggregate Intrinsic Value, Outstanding \| $	$ 52,211
Aggregate Intrinsic Value, Exercisable \| $	$ 52,211

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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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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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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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