| | 2019-12-31 | 2020-09-30 | 2020-12-31 | 2021-12-31 | 2022-12-31 | 2023-12-31 | 2024-09-30 |
| Beginning Cash Position | | | 70733000.0 | 128009000.0 | 76194000.0 | 97735000.0 | 223121000.0 |
| Capital Expenditure | | | -7093000.0 | -3659000.0 | -22832000.0 | -15994000.0 | -22192000.0 |
| Cash Dividends Paid | | | -467765000.0 | -600994000.0 | -805311000.0 | -1046341000.0 | -1373316000.0 |
| Cash Flow From Continuing Financing Activities | | | 241471000.0 | -166711000.0 | 431861000.0 | 423130000.0 | -912755000.0 |
| Cash Flow From Continuing Investing Activities | | | -955427000.0 | -837540000.0 | -1648459000.0 | -1818256000.0 | -1059707000.0 |
| Cash Flow From Continuing Operating Activities | | | 771232000.0 | 952436000.0 | 1238139000.0 | 1402474000.0 | 1843666000.0 |
| Change In Other Current Assets | | -19306000.0 | -19674000.0 | -22022000.0 | 695000.0 | -32507000.0 | 44905000.0 |
| Change In Other Current Liabilities | | 5540000.0 | 19632000.0 | -9494000.0 | 8285000.0 | -3082000.0 | 31869000.0 |
| Change In Other Working Capital | -14815000.0 | | -42000.0 | | | | |
| Change In Payables And Accrued Expense | | | 17974000.0 | 10951000.0 | 29027000.0 | 35031000.0 | -54134000.0 |
| Change In Working Capital | | | 17932000.0 | -20565000.0 | 38007000.0 | -558000.0 | 22640000.0 |
| Changes In Cash | | | 57276000.0 | -51815000.0 | 21541000.0 | 7348000.0 | -128796000.0 |
| Common Stock Dividend Paid | | | -467765000.0 | -600994000.0 | -805311000.0 | -1046341000.0 | -1373316000.0 |
| Common Stock Issuance | | | 103468000.0 | 273189000.0 | 0.0 | 0.0 | 365000.0 |
| Common Stock Payments | | | -67873000.0 | 0.0 | -63008000.0 | 0.0 | |
| Depreciation Amortization Depletion | | | 224444000.0 | 241879000.0 | 288316000.0 | 506053000.0 | 782960000.0 |
| Depreciation And Amortization | | | 224444000.0 | 241879000.0 | 288316000.0 | 506053000.0 | 782960000.0 |
| Dividend Received CFO | | | 6893000.0 | 7035000.0 | 13162000.0 | 20060000.0 | 30415000.0 |
| Earnings Losses From Equity Investments | | | 0.0 | -6251000.0 | 0.0 | 0.0 | -13730000.0 |
| End Cash Position | | | 128009000.0 | 76194000.0 | 97735000.0 | 105083000.0 | 94325000.0 |
| Financing Cash Flow | | | 241471000.0 | -166711000.0 | 431861000.0 | 423130000.0 | -912755000.0 |
| Free Cash Flow | | | 764139000.0 | 948777000.0 | 1215307000.0 | 1386480000.0 | 1821474000.0 |
| Gain Loss On Investment Securities | -1205000.0 | | -18075000.0 | -140760000.0 | -14249000.0 | | |
| Income Tax Paid Supplemental Data | | | 5181000.0 | 26252000.0 | 18957000.0 | 22753000.0 | 33166000.0 |
| Interest Paid Supplemental Data | | | 159597000.0 | 152170000.0 | 197069000.0 | 338552000.0 | 512417000.0 |
| Investing Cash Flow | | | -955427000.0 | -837540000.0 | -1648459000.0 | -1818256000.0 | -1059707000.0 |
| Issuance Of Capital Stock | | | 103468000.0 | 273189000.0 | 0.0 | 0.0 | 365000.0 |
| Issuance Of Debt | | | 3281000000.0 | 5706981000.0 | 5584111000.0 | 8663003000.0 | 9060700000.0 |
| Long Term Debt Issuance | | | 3281000000.0 | 5706981000.0 | 5584111000.0 | 8663003000.0 | 9060700000.0 |
| Long Term Debt Payments | | | -2589730000.0 | -5500290000.0 | -4207700000.0 | -7088984000.0 | -8534125000.0 |
| Net Business Purchase And Sale | | | -64421000.0 | -23068000.0 | -275923000.0 | -1362690000.0 | 4803000.0 |
| Net Common Stock Issuance | | | 35595000.0 | 273189000.0 | -63008000.0 | 0.0 | 365000.0 |
| Net Income From Continuing Operations | | | 517582000.0 | 877758000.0 | 921156000.0 | 850453000.0 | 849838000.0 |
| Net Investment Properties Purchase And Sale | | | -343424000.0 | -716796000.0 | -1314143000.0 | -418760000.0 | -614244000.0 |
| Net Investment Purchase And Sale | 0.0 | | -300000000.0 | 0.0 | 0.0 | | |
| Net Issuance Payments Of Debt | | | 691270000.0 | 206691000.0 | 1376411000.0 | 1574019000.0 | 526575000.0 |
| Net Long Term Debt Issuance | | | 691270000.0 | 206691000.0 | 1376411000.0 | 1574019000.0 | 526575000.0 |
| Net Other Financing Charges | | | -22388000.0 | -50169000.0 | -71731000.0 | -99171000.0 | -66002000.0 |
| Net Other Investing Changes | | | -240489000.0 | -94017000.0 | -35561000.0 | -20812000.0 | -428074000.0 |
| Net PPEPurchase And Sale | | | -7093000.0 | -3659000.0 | -22832000.0 | -15994000.0 | -22192000.0 |
| Net Preferred Stock Issuance | | | 0.0 | 0.0 | -4500000.0 | -5377000.0 | -377000.0 |
| Operating Cash Flow | | | 771232000.0 | 952436000.0 | 1238139000.0 | 1402474000.0 | 1843666000.0 |
| Operating Gains Losses | -1205000.0 | | -18075000.0 | -147011000.0 | -14249000.0 | | |
| Other Non Cash Items | | | 6175000.0 | -23963000.0 | -29639000.0 | -172000.0 | 34538000.0 |
| Preferred Stock Payments | | | 0.0 | 0.0 | -4500000.0 | -5377000.0 | -377000.0 |
| Proceeds From Stock Option Exercised | | | 4759000.0 | 4572000.0 | 0.0 | 0.0 | |
| Purchase Of Business | | | -64792000.0 | -54602000.0 | -276265000.0 | -1362690000.0 | -8196000.0 |
| Purchase Of Investment | 0.0 | | -300000000.0 | 0.0 | 0.0 | | |
| Purchase Of Investment Properties | | | -387448000.0 | -1289524000.0 | -1353510000.0 | -420892000.0 | -618659000.0 |
| Purchase Of PPE | | | -7093000.0 | -3659000.0 | -22832000.0 | -15994000.0 | -22192000.0 |
| Repayment Of Debt | | | -2589730000.0 | -5500290000.0 | -4207700000.0 | -7088984000.0 | -8534125000.0 |
| Repurchase Of Capital Stock | | | -67873000.0 | 0.0 | -67508000.0 | -5377000.0 | -377000.0 |
| Sale Of Business | | | 371000.0 | 31534000.0 | 342000.0 | 0.0 | 12999000.0 |
| Sale Of Investment Properties | | | 44024000.0 | 572728000.0 | 39367000.0 | 2132000.0 | 4415000.0 |
| Stock Based Compensation | | | 16281000.0 | 17303000.0 | 21386000.0 | 26638000.0 | 21622000.0 |
