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v3.21.2

Stock-Based Compensation (Narrative) (Details) $ / shares in Units, $ in Thousands |  |  | 6 Months Ended | 9 Months Ended | 24 Months Ended
--- | --- | --- | --- | --- | ---
Mar. 15, 2021 shares | Dec. 30, 2020 USD ($) employee | Jun. 30, 2021 shares | Sep. 30, 2021 USD ($) $ / shares shares | Dec. 31, 2022 item
SOSARs [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Granted, Weighted-Average Exercise Price | $ / shares |  |  |  | $ 1,493.03 |
Shares granted |  |  |  | 77,000 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period |  |  |  | 16,000 |
Stock option exercises (shares) |  |  |  | 430,000 |
Weighted-average grant date fair value | $ / shares |  |  |  | $ 397.44 |
SOSARs [Member] | Vesting Period 1 [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting period |  |  |  | 2 years |
SOSARs [Member] | Vesting Period 2 [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting period |  |  |  | 3 years |
Restricted Stock Units [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Units vested |  |  |  | 49,000 |
Shares granted |  |  |  | 24,000 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period |  |  |  | 8,000 |
Weighted-average grant date fair value | $ / shares |  |  |  | $ 1,479.78 |
Restricted Stock Units [Member] | Vesting Period 1 [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting period |  |  |  | 2 years |
Restricted Stock Units [Member] | Vesting Period 2 [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting period |  |  |  | 3 years |
Performance Shares [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Units vested |  |  |  | 0 |
Units forfeited |  |  |  | 1,000 |
Performance shares granted |  |  |  | 18,000 |
Weighted-average grant date fair value | $ / shares |  |  |  | $ 1,479.55 |
Performance and market measurement period |  |  |  | 3 years |
Performance Shares [Member] | 2018 Stock Awards [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Units vested | 29,000 |  |  |  |
Number of employees affected by modified service requirements | employee |  | 7 |  |  |
Modified service requirements expense | $ |  | $ 71,441 |  |  |
Stock-based compensation expense | $ |  |  |  | $ 55,463 |
Modified service requirements expense, unamortized | $ |  |  |  | $ 15,512 |
Performance Shares [Member] | First Of Four Installments [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Units vested |  |  | 17,000 |  |
Performance Shares [Member] | Defined Minimum Targets Not Met [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Units vested |  |  |  | 0 |
Forecast [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Number of installments | item |  |  |  |  | 4
Minimum [Member] | Performance Shares [Member] | Vesting Period 1 [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting percentage |  |  |  | 0.00% |
Maximum [Member] | Performance Shares [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Percentage of target number of shares to be earned if certain criteria is met |  |  |  | 100.00% |
Maximum [Member] | Performance Shares [Member] | Vesting Period 1 [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting percentage |  |  |  | 300.00% |

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