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Stock-Based Compensation (Narrative) (Details) $ / shares in Units, $ in Thousands |  |  | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Mar. 15, 2021 shares | Dec. 30, 2020 USD ($) employee $ / shares | Jun. 30, 2022 USD ($) item $ / shares shares | Jun. 30, 2021 USD ($) | Dec. 31, 2021 item shares
Stock Options And SOSARs [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Shares granted |  |  | 84,000 |  |
Shares forfeited |  |  | 10,000 |  |
Grant date fair value | $ / shares |  |  | $ 452.39 |  |
Granted, weighted-average exercise price | $ / shares |  |  | $ 1,574.58 |  |
Shares exercised |  |  | 41,000 |  |
Weighted-average Black-Scholes fair value per share at date of grant | $ / shares |  |  | $ 452.39 |  |
Stock Options And SOSARs [Member] | Vesting Period 1 [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting period |  |  | 2 years |  |
Stock Options And 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] |  |  |  |  |
Shares granted |  |  | 28,000 |  |
Shares forfeited |  |  | 6,000 |  |
Grant date fair value | $ / shares |  |  | $ 1,563.51 |  |
Units vested |  |  | 22,000 |  |
Weighted-average Black-Scholes fair value per share at date of grant | $ / shares |  |  | $ 1,563.51 |  |
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] |  |  |  |  |
Grant date fair value | $ / shares |  |  | $ 1,578.00 |  |
Units vested |  |  | 55,000 |  |
Units forfeited |  |  | 1,000 |  |
Performance shares granted |  |  | 21,000 |  |
Weighted-average Black-Scholes fair value per share at date of grant | $ / shares |  |  | $ 1,578.00 |  |
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] |  |  |  |  |
Number of installments | item |  |  | 4 |  |
Units vested | 29,000 |  |  |  |
Number of installments remaining | item |  |  | 1 |  |
Remaining service period |  |  | 6 months |  |
Number of employees affected by modified service requirements | employee |  | 7 |  |  |
Modified service requirements expense | $ |  | $ 71,441 |  |  |
Stock-based compensation expense | $ |  |  | $ 5,284 | $ 47,827 |
Modified service requirements expense, unamortized | $ |  |  | $ 3,107 |  |
Stock price | $ / shares |  | $ 1,374.17 |  |  |
Performance Shares [Member] | First Half Vested [Member] | 2018 Stock Awards [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Number of installments | item |  |  |  |  | 2
Units vested |  |  |  |  | 33,000
Performance Shares [Member] | Second Half Vested [Member] | 2018 Stock Awards [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Units vested |  |  | 8,000 |  |
Performance Shares [Member] | Defined Minimum Targets Not Met [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Units vested |  |  | 0 |  |
Minimum [Member] | Performance Shares [Member] | Vesting Period 1 [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Targeted number of shares, quantity that will vest, 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] |  |  |  |  |
Targeted number of shares, quantity that will vest, percentage |  |  | 300.00% |  |

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