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Share-Based Compensation And Share Repurchase Plans (Schedule Of Restricted Stock Units Issued And Vested) (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Value of options, Unvested | $ 13,969 | $ 223,885
Restricted Stock Units (RSUs) [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Number of options, Granted | 697,515 |
Number of options, Vesting | 225,967 |
Number of options, Forfeited | 7,337 |
Number of options, Unvested | 464,211 |
Value of options, Granted | $ 6,221,091 |
Value of options, Vesting | 3,341,245 |
Value of options, Forfeited | 107,144 |
Value of options, Unvested | $ 2,772,703 |
Restricted Stock Units (RSUs) [Member] | 2016 [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Number of options, Granted | 68,153 |
Number of options, Vesting | 67,372 |
Number of options, Forfeited | 781 |
Value of options, Granted | $ 815,160 |
Value of options, Vesting | 805,760 |
Value of options, Forfeited | $ 9,400 |
Restricted Stock Units (RSUs) [Member] | 2017 [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Number of options, Granted | 70,538 |
Number of options, Vesting | 61,590 |
Number of options, Forfeited | 532 |
Number of options, Unvested | 8,416 |
Value of options, Granted | $ 1,124,348 |
Value of options, Vesting | 981,448 |
Value of options, Forfeited | 8,496 |
Value of options, Unvested | $ 134,404 |
Restricted Stock Units (RSUs) [Member] | 2018 [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Number of options, Granted | 97,600 |
Number of options, Vesting | 74,292 |
Number of options, Forfeited | 2,102 |
Number of options, Unvested | 21,206 |
Value of options, Granted | $ 1,581,512 |
Value of options, Vesting | 1,199,232 |
Value of options, Forfeited | 34,240 |
Value of options, Unvested | $ 348,040 |
Restricted Stock Units (RSUs) [Member] | 2019 [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Number of options, Granted | 59,258 |
Number of options, Vesting | 22,713 |
Number of options, Forfeited | 3,104 |
Number of options, Unvested | 33,441 |
Value of options, Granted | $ 944,070 |
Value of options, Vesting | 354,806 |
Value of options, Forfeited | 50,005 |
Value of options, Unvested | $ 539,259 |
Restricted Stock Units (RSUs) [Member] | 2020 [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Number of options, Granted | 401,966 |
Number of options, Forfeited | 818 |
Number of options, Unvested | 401,148 |
Value of options, Granted | $ 1,756,002 |
Value of options, Forfeited | 5,002 |
Value of options, Unvested | $ 1,751,000 |

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- Definition Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Aggregate Intrinsic Value, Granted + References No definition available. + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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