Stock-Based Compensation (Summary of Activity of Options Outstanding not yet Vested) (Details) shares in Thousands	12 Months Ended
Dec. 31, 2021 $ / shares shares
Stock-Based Compensation [Abstract]
Number of Shares, Unvested as of December 31, 2020 \| shares	1,502
Number of Shares, Vested \| shares	(756)
Number of Shares, Forfeited \| shares	(13)
Number of Shares, Unvested as of December 31, 2021 \| shares	733
Weighted-Average Fair Value Per Share, Unvested as of December 31, 2020 \| $ / shares	$ 31.91
Weighted-Average Fair Value Per Share, Vested \| $ / shares	30.09
Weighted-Average Fair Value Per Share, Forfeited \| $ / shares	34.13
Weighted-Average Fair Value Per Share, Unvested as of December 31, 2021 \| $ / shares	$ 33.74

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Share-based compensation arrangement by share-based payment award, options, forfeited or canceled, weighted average grant date fair value.

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Share-based compensation arrangement by share-based payment award options, nonvested number.

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Share-based compensation arrangement by share-based payment award options, nonvested number vested in period.

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Share-based compensation arrangement by share-based payment award options nonvested, weighted average grant date fair value.

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Share-based compensation arrangement by share-based payment award, options, vested in period, weighted average grant date fair value

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