Share-Based Compensation and Benefit Plans (Stock Option Activity) (Details) - Stock option [Member] - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Share-Based Compensation and Benefit Plans
Compensation expense for share-based compensation	$ 4,878	$ 4,508
Income tax benefit from compensation expense for share-based compensation	$ 1,276	$ 1,112
Weighted-average grant date fair value of options awarded	$ 107.26	$ 108.74

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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