Stock-Based Compensation (Exercises) (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
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Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Options exercised, intrinsic value | $ 814 | $ 71,900 | $ 6,600 |
| Option Exchange | |||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Options exercised, intrinsic value | $ 56,300 | ||
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- Definition 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. No definition available.
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- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Details
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