Stock-Based Compensation (Summary of Activity of Options Outstanding not yet Vested) (Details) shares in Thousands	12 Months Ended
	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