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Stock-Based Compensation (Summary of Activity of Options Outstanding not yet Vested) (Details) shares in Thousands | 12 Months Ended
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Dec. 31, 2023 $ / shares shares
Stock-Based Compensation [Abstract] |
Number of Shares, Unvested as of December 31, 2021 | shares | 266
Number of Shares, Granted | shares | 20
Number of Shares, Vested | shares | (252)
Number of Shares, Forfeited | shares | (6)
Number of Shares, Unvested as of December 31, 2022 | shares | 28
Weighted-Average Fair Value Per Share, Unvested as of December 31, 2021 | $ / shares | $ 35.91
Weighted-Average Fair Value Per Share, Granted | $ / shares | 58.95
Weighted-Average Fair Value Per Share, Vested | $ / shares | 34.33
Weighted-Average Fair Value Per Share, Forfeited | $ / shares | 40.45
Weighted-Average Fair Value Per Share, Unvested as of December 31, 2022 | $ / shares | $ 65.61

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