| | 2020-09-30 | 2021-12-31 | 2022-12-31 | 2023-12-31 | 2024-12-31 | 2025-06-30 | 2025-12-31 |
| Asset Impairment Charge | | | 0.0 | 0.0 | 51763000.0 | | 0.0 |
| Beginning Cash Position | | | 76194000.0 | 97735000.0 | 105083000.0 | 81544000.0 | 143303000.0 |
| Capital Expenditure | | | -22832000.0 | -15994000.0 | -20514000.0 | -19264000.0 | -21139000.0 |
| Cash Dividends Paid | | | -805311000.0 | -1046341000.0 | -1375003000.0 | -1375452000.0 | -1374298000.0 |
| Cash Flow From Continuing Financing Activities | | | 431861000.0 | 423130000.0 | -202290000.0 | -358343000.0 | -1036103000.0 |
| Cash Flow From Continuing Investing Activities | | | -1648459000.0 | -1818256000.0 | -1646920000.0 | -1496408000.0 | -814213000.0 |
| Cash Flow From Continuing Operating Activities | | | 1238139000.0 | 1402474000.0 | 1887430000.0 | 1901896000.0 | 1850193000.0 |
| Change In Other Current Assets | -19306000.0 | | 695000.0 | -34471000.0 | -15464000.0 | 18423000.0 | 21151000.0 |
| Change In Other Current Liabilities | 5540000.0 | | 8285000.0 | -2928000.0 | 62750000.0 | -3946000.0 | -42302000.0 |
| Change In Payables And Accrued Expense | | | 29027000.0 | 35031000.0 | 964000.0 | 35824000.0 | 7296000.0 |
| Change In Working Capital | | | 38007000.0 | -2368000.0 | 48250000.0 | 50301000.0 | -13855000.0 |
| Changes In Cash | | | 21541000.0 | 7348000.0 | 38220000.0 | 47144000.0 | -123000.0 |
| Common Stock Dividend Paid | | | -805311000.0 | -1046341000.0 | -1375003000.0 | -1375452000.0 | -1374298000.0 |
| Common Stock Issuance | | | 0.0 | 0.0 | 365000.0 | -1000.0 | 0.0 |
| Common Stock Payments | | | -63008000.0 | 0.0 | 0.0 | -8615000.0 | -149548000.0 |
| Depreciation Amortization Depletion | | | 288316000.0 | 506053000.0 | 783023000.0 | 748870000.0 | 715177000.0 |
| Depreciation And Amortization | | | 288316000.0 | 506053000.0 | 783023000.0 | 748870000.0 | 715177000.0 |
| Dividend Received CFO | | | 13162000.0 | 20060000.0 | 30745000.0 | 34115000.0 | 29224000.0 |
| Earnings Losses From Equity Investments | | | 0.0 | 0.0 | -13730000.0 | | -54521000.0 |
| End Cash Position | | | 97735000.0 | 105083000.0 | 143303000.0 | 128688000.0 | 143180000.0 |
| Financing Cash Flow | | | 431861000.0 | 423130000.0 | -202290000.0 | -358343000.0 | -1036103000.0 |
| Free Cash Flow | | | 1215307000.0 | 1386480000.0 | 1866916000.0 | 1882631000.0 | 1829054000.0 |
| Gain Loss On Investment Securities | | -140760000.0 | -14249000.0 | | 25906000.0 | -63650000.0 | 76310000.0 |
| Income Tax Paid Supplemental Data | | 26252000.0 | 18957000.0 | 22753000.0 | 33772000.0 | 35693000.0 | |
| Interest Paid Supplemental Data | | | 197069000.0 | 338552000.0 | 499417000.0 | 552594000.0 | 564665000.0 |
| Investing Cash Flow | | | -1648459000.0 | -1818256000.0 | -1646920000.0 | -1496408000.0 | -814213000.0 |
| Issuance Of Capital Stock | | | 0.0 | 0.0 | 365000.0 | -1000.0 | 0.0 |
| Issuance Of Debt | | | 5584111000.0 | 8663003000.0 | 9985933000.0 | 13412894000.0 | 17833143000.0 |
| Long Term Debt Issuance | | | 5584111000.0 | 8663003000.0 | 9985933000.0 | 13412894000.0 | 17833143000.0 |
| Long Term Debt Payments | | | -4207700000.0 | -7088984000.0 | -8724444000.0 | -12292005000.0 | -17248640000.0 |
| Net Business Purchase And Sale | | | -275923000.0 | -1362690000.0 | -286504000.0 | -193200000.0 | 164207000.0 |
| Net Common Stock Issuance | | | -63008000.0 | 0.0 | 365000.0 | -8616000.0 | -149548000.0 |
| Net Income From Continuing Operations | | | 921156000.0 | 850453000.0 | 900232000.0 | 1028387000.0 | 1022538000.0 |
| Net Investment Properties Purchase And Sale | | | -1314143000.0 | -418760000.0 | -654225000.0 | -838383000.0 | -701109000.0 |
| Net Investment Purchase And Sale | | 0.0 | 0.0 | | | | |
| Net Issuance Payments Of Debt | | | 1376411000.0 | 1574019000.0 | 1261489000.0 | 1120889000.0 | 584503000.0 |
| Net Long Term Debt Issuance | | | 1376411000.0 | 1574019000.0 | 1261489000.0 | 1120889000.0 | 584503000.0 |
| Net Other Financing Charges | | | -71731000.0 | -99171000.0 | -89141000.0 | -87510000.0 | -96760000.0 |
| Net Other Investing Changes | | | -35561000.0 | -20812000.0 | -685677000.0 | -445561000.0 | -256172000.0 |
| Net PPEPurchase And Sale | | | -22832000.0 | -15994000.0 | -20514000.0 | -19264000.0 | -21139000.0 |
| Net Preferred Stock Issuance | | | -4500000.0 | -5377000.0 | 0.0 | | 0.0 |
| Operating Cash Flow | | | 1238139000.0 | 1402474000.0 | 1887430000.0 | 1901895000.0 | 1850193000.0 |
| Operating Gains Losses | | -147011000.0 | -14249000.0 | | 12176000.0 | -77380000.0 | 21789000.0 |
| Other Non Cash Items | | | -29639000.0 | 1792000.0 | 32250000.0 | 33446000.0 | 39783000.0 |
| Preferred Stock Payments | | | -4500000.0 | -5377000.0 | 0.0 | | 0.0 |
| Proceeds From Stock Option Exercised | | 4572000.0 | 0.0 | 0.0 | | | |
| Purchase Of Business | | | -276265000.0 | -1362690000.0 | -301917000.0 | -404413000.0 | -127105000.0 |
| Purchase Of Investment | | 0.0 | 0.0 | | | | |
| Purchase Of Investment Properties | | | -1353510000.0 | -420892000.0 | -779153000.0 | -1096517000.0 | -1069292000.0 |
| Purchase Of PPE | | | -22832000.0 | -15994000.0 | -20514000.0 | -19264000.0 | -21139000.0 |
| Repayment Of Debt | | | -4207700000.0 | -7088984000.0 | -8724444000.0 | -12292005000.0 | -17248640000.0 |
| Repurchase Of Capital Stock | | | -67508000.0 | -5377000.0 | 0.0 | -8615000.0 | -149548000.0 |
| Sale Of Business | | | 342000.0 | 0.0 | 15413000.0 | 211213000.0 | 291312000.0 |
| Sale Of Investment Properties | | | 39367000.0 | 2132000.0 | 124928000.0 | 258134000.0 | 368183000.0 |
| Stock Based Compensation | | | 21386000.0 | 26484000.0 | 28991000.0 | 32393000.0 | 35537000.0 |
