| | 2020-07-31 | 2021-07-31 | 2022-07-31 | 2023-07-31 | 2024-07-31 |
| Amortization Cash Flow | | 6795000.0 | 9010000.0 | 11060000.0 | 14624000.0 |
| Amortization Of Intangibles | | 6795000.0 | 9010000.0 | 11060000.0 | 14624000.0 |
| Amortization Of Securities | | 11715000.0 | 6580000.0 | -6582000.0 | -19062000.0 |
| Asset Impairment Charge | 746000.0 | 416000.0 | 0.0 | 0.0 | |
| Beginning Cash Position | | 141851000.0 | 275898000.0 | 1013210000.0 | 1262206000.0 |
| Capital Expenditure | | -58297000.0 | -90580000.0 | -128724000.0 | -194896000.0 |
| Capital Expenditure Reported | | -10132000.0 | -21284000.0 | -31527000.0 | -50308000.0 |
| Cash Flow From Continuing Financing Activities | | 41675000.0 | 41337000.0 | 45990000.0 | 64208000.0 |
| Cash Flow From Continuing Investing Activities | | -109668000.0 | 374063000.0 | -259337000.0 | -683180000.0 |
| Cash Flow From Continuing Operating Activities | | 202040000.0 | 321912000.0 | 462343000.0 | 779846000.0 |
| Change In Account Payable | | 7451000.0 | 14358000.0 | -8416000.0 | 4164000.0 |
| Change In Accrued Expense | | 6532000.0 | 13377000.0 | 26814000.0 | 43556000.0 |
| Change In Other Current Liabilities | | -22051000.0 | -27663000.0 | -32197000.0 | -49239000.0 |
| Change In Other Working Capital | | 168629000.0 | 251002000.0 | 266152000.0 | 260518000.0 |
| Change In Payable | | 7451000.0 | 14358000.0 | -8416000.0 | 4164000.0 |
| Change In Payables And Accrued Expense | | 13983000.0 | 27735000.0 | 18398000.0 | 47720000.0 |
| Change In Prepaid Assets | | -3388000.0 | -10287000.0 | -39922000.0 | -39971000.0 |
| Change In Receivables | | -111605000.0 | -143336000.0 | -183858000.0 | -152960000.0 |
| Change In Working Capital | | 45568000.0 | 97451000.0 | 28573000.0 | 66068000.0 |
| Changes In Account Receivables | | -111605000.0 | -143336000.0 | -183858000.0 | -152960000.0 |
| Changes In Cash | | 134047000.0 | 737312000.0 | 248996000.0 | 160874000.0 |
| Common Stock Issuance | 0.0 | | | | |
| Common Stock Payments | 0.0 | 0.0 | | | |
| Deferred Income Tax | | -2406000.0 | -562000.0 | 352000.0 | -5633000.0 |
| Deferred Tax | | -2406000.0 | -562000.0 | 352000.0 | -5633000.0 |
| Depreciation | | 29663000.0 | 40456000.0 | 55756000.0 | 66308000.0 |
| Depreciation Amortization Depletion | | 36458000.0 | 49466000.0 | 66816000.0 | 80932000.0 |
| Depreciation And Amortization | | 36458000.0 | 49466000.0 | 66816000.0 | 80932000.0 |
| End Cash Position | | 275898000.0 | 1013210000.0 | 1262206000.0 | 1423080000.0 |
| Financing Cash Flow | | 41675000.0 | 41337000.0 | 45990000.0 | 64208000.0 |
| Free Cash Flow | | 143743000.0 | 231332000.0 | 333619000.0 | 584950000.0 |
| Gain Loss On Investment Securities | | 209000.0 | 1499000.0 | -3319000.0 | 753000.0 |
| Income Tax Paid Supplemental Data | | 4144000.0 | 5606000.0 | 14940000.0 | 23123000.0 |
| Interest Paid Supplemental Data | | 1462000.0 | 1438000.0 | 1438000.0 | 1436000.0 |
| Investing Cash Flow | | -109668000.0 | 374063000.0 | -259337000.0 | -683180000.0 |
| Issuance Of Capital Stock | 0.0 | | | | |
| Issuance Of Debt | 1130522000.0 | 0.0 | 0.0 | | |
| Long Term Debt Issuance | 1130522000.0 | 0.0 | 0.0 | | |
| Net Business Purchase And Sale | | -40530000.0 | -25287000.0 | -15643000.0 | -374702000.0 |
| Net Common Stock Issuance | 0.0 | 0.0 | | | |
| Net Income From Continuing Operations | | -262029000.0 | -390278000.0 | -202335000.0 | -57706000.0 |
| Net Intangibles Purchase And Sale | 0.0 | 0.0 | | | |
| Net Investment Purchase And Sale | | -10841000.0 | 489930000.0 | -114970000.0 | -113582000.0 |
| Net Issuance Payments Of Debt | 1130522000.0 | 0.0 | 0.0 | | |
| Net Long Term Debt Issuance | 1130522000.0 | 0.0 | 0.0 | | |
| Net Other Financing Charges | | -2250000.0 | -255000.0 | -217000.0 | -39000.0 |
| Net PPEPurchase And Sale | | -48165000.0 | -69296000.0 | -97197000.0 | -144588000.0 |
| Operating Cash Flow | | 202040000.0 | 321912000.0 | 462343000.0 | 779846000.0 |
| Operating Gains Losses | | 209000.0 | 1499000.0 | -3319000.0 | 753000.0 |
| Other Non Cash Items | | 113574000.0 | 148194000.0 | 134004000.0 | 186818000.0 |
| Proceeds From Stock Option Exercised | | 43925000.0 | 41592000.0 | 46207000.0 | 64247000.0 |
| Purchase Of Business | | -40530000.0 | -25287000.0 | -15643000.0 | -374702000.0 |
| Purchase Of Intangibles | 0.0 | 0.0 | | | |
| Purchase Of Investment | | -818557000.0 | -844944000.0 | -1067349000.0 | -1293015000.0 |
| Purchase Of PPE | | -48165000.0 | -69296000.0 | -97197000.0 | -144588000.0 |
| Repurchase Of Capital Stock | 0.0 | 0.0 | | | |
| Sale Of Investment | | 807716000.0 | 1334874000.0 | 952379000.0 | 1179433000.0 |
| Stock Based Compensation | | 258535000.0 | 409562000.0 | 444834000.0 | 527676000.0 |
