| | 2021-12-31 | 2022-12-31 | 2023-12-31 | 2024-12-31 | 2025-06-30 | 2025-12-31 |
| Amortization Cash Flow | | 0.0 | 0.0 | -992000.0 | | |
| Amortization Of Intangibles | | 0.0 | 0.0 | -992000.0 | | |
| Asset Impairment Charge | | 0.0 | 0.0 | 13615000.0 | 0.0 | 85803000.0 |
| Beginning Cash Position | | 501158000.0 | 736812000.0 | 1612567000.0 | 737501000.0 | 1335196000.0 |
| Cash Dividends Paid | | -685019000.0 | -687809000.0 | -689870000.0 | -691714000.0 | -643107000.0 |
| Cash Flow From Continuing Financing Activities | | 556057000.0 | 767916000.0 | -274476000.0 | -146387000.0 | -378561000.0 |
| Cash Flow From Continuing Investing Activities | | -1602802000.0 | -1193681000.0 | -1237396000.0 | -1296296000.0 | -644526000.0 |
| Cash Flow From Continuing Operating Activities | | 1282399000.0 | 1301520000.0 | 1234501000.0 | 1233023000.0 | 1245157000.0 |
| Change In Account Payable | | -22777000.0 | 41696000.0 | -2395000.0 | 34388000.0 | 27161000.0 |
| Change In Accrued Expense | | 8989000.0 | 29910000.0 | -5647000.0 | 8874000.0 | -2743000.0 |
| Change In Interest Payable | | 8989000.0 | 29910000.0 | -5647000.0 | 8874000.0 | -2743000.0 |
| Change In Other Current Assets | | 0.0 | -25640000.0 | -750000.0 | 0.0 | 0.0 |
| Change In Other Current Liabilities | | -23995000.0 | 7146000.0 | 12624000.0 | 10403000.0 | -22678000.0 |
| Change In Other Working Capital | | -84057000.0 | -77666000.0 | -118962000.0 | -123374000.0 | -122618000.0 |
| Change In Payable | | -22777000.0 | 41696000.0 | -2395000.0 | 34388000.0 | 27161000.0 |
| Change In Payables And Accrued Expense | | -13788000.0 | 71606000.0 | -8042000.0 | 43262000.0 | 24418000.0 |
| Change In Prepaid Assets | | 20099000.0 | -7336000.0 | -5384000.0 | -12974000.0 | -4148000.0 |
| Change In Receivables | | -105848000.0 | -131009000.0 | -83893000.0 | -117932000.0 | -69371000.0 |
| Change In Working Capital | | -207589000.0 | -162899000.0 | -204407000.0 | -200615000.0 | -194397000.0 |
| Changes In Account Receivables | | -7621000.0 | -31470000.0 | 13716000.0 | -21691000.0 | 32507000.0 |
| Changes In Cash | | 235654000.0 | 875755000.0 | -277371000.0 | -209660000.0 | 222070000.0 |
| Common Stock Dividend Paid | | -685019000.0 | -687809000.0 | -689870000.0 | -691714000.0 | -643107000.0 |
| Common Stock Issuance | 24214000.0 | | | | | |
| Depreciation | | 752202000.0 | 832753000.0 | 889453000.0 | 893625000.0 | 912352000.0 |
| Depreciation Amortization Depletion | | 752202000.0 | 832753000.0 | 889453000.0 | 893625000.0 | 912352000.0 |
| Depreciation And Amortization | | 752202000.0 | 832753000.0 | 889453000.0 | 893625000.0 | 912352000.0 |
| Dividend Received CFO | | 26827000.0 | 24637000.0 | 33861000.0 | 38565000.0 | 58424000.0 |
| Dividends Received CFI | | 37122000.0 | 32787000.0 | 28325000.0 | | 172662000.0 |
| Earnings Losses From Equity Investments | | 59840000.0 | 239543000.0 | 343177000.0 | 362027000.0 | 103560000.0 |
| End Cash Position | | 736812000.0 | 1612567000.0 | 1335196000.0 | 527841000.0 | 1557266000.0 |
| Financing Cash Flow | | 556057000.0 | 767916000.0 | -274476000.0 | -146387000.0 | -378561000.0 |
| Free Cash Flow | | 1282399000.0 | 1301520000.0 | 1234501000.0 | 1233023000.0 | 1245157000.0 |
| Gain Loss On Investment Securities | | -440474000.0 | -6312000.0 | -5564000.0 | -22626000.0 | -181867000.0 |
| Interest Paid Supplemental Data | | 449903000.0 | 553989000.0 | 676067000.0 | 679342000.0 | 677156000.0 |
| Investing Cash Flow | | -1602802000.0 | -1193681000.0 | -1237396000.0 | -1296296000.0 | -644526000.0 |
| Issuance Of Capital Stock | 24214000.0 | | | | | |
| Issuance Of Debt | | 2464557000.0 | 2547727000.0 | 6213004000.0 | 9571294000.0 | 11221025000.0 |
| Long Term Debt Issuance | | 2464557000.0 | 2547727000.0 | 849671000.0 | 4207961000.0 | 2565000000.0 |
| Long Term Debt Payments | | -1130000000.0 | -1230000000.0 | -1217327000.0 | -4291486000.0 | -2432913000.0 |
| Net Business Purchase And Sale | | -277581000.0 | -192650000.0 | -132096000.0 | -156067000.0 | -258752000.0 |
| Net Common Stock Issuance | 24214000.0 | | | | | |
| Net Income From Continuing Operations | | 1020584000.0 | 291424000.0 | 84188000.0 | 76681000.0 | 383995000.0 |
| Net Investment Properties Purchase And Sale | | -1381465000.0 | -1020950000.0 | -1128003000.0 | -1161446000.0 | -612595000.0 |
| Net Investment Purchase And Sale | | 2498000.0 | -691000.0 | -2364000.0 | -3473000.0 | -2980000.0 |
| Net Issuance Payments Of Debt | | 1334557000.0 | 1317727000.0 | 132344000.0 | 416475000.0 | 382087000.0 |
| Net Long Term Debt Issuance | | 1334557000.0 | 1317727000.0 | -367656000.0 | -83525000.0 | 132087000.0 |
| Net Other Financing Charges | | -93481000.0 | 137998000.0 | 283050000.0 | 128852000.0 | -117541000.0 |
| Net Other Investing Changes | | 16624000.0 | -12177000.0 | -3258000.0 | -3635000.0 | 57139000.0 |
| Net Preferred Stock Issuance | -200000000.0 | 0.0 | 0.0 | | | |
| Net Short Term Debt Issuance | | 0.0 | 0.0 | 500000000.0 | | 250000000.0 |
| Operating Cash Flow | | 1282399000.0 | 1301520000.0 | 1234501000.0 | 1233023000.0 | 1245157000.0 |
| Operating Gains Losses | | -380634000.0 | 233231000.0 | 337613000.0 | 339739000.0 | -77969000.0 |
| Other Non Cash Items | | 19207000.0 | 30523000.0 | 36151000.0 | 41370000.0 | 33748000.0 |
| Preferred Stock Payments | -200000000.0 | 0.0 | 0.0 | | | |
| Provisionand Write Offof Assets | | -224000.0 | 373000.0 | 78000.0 | 36000.0 | -1133000.0 |
| Purchase Of Business | | -277581000.0 | -192650000.0 | -132096000.0 | -156067000.0 | -258752000.0 |
| Purchase Of Investment | | -2404000.0 | -2187000.0 | -2500000.0 | -3305000.0 | -3538000.0 |
| Purchase Of Investment Properties | | -2216235000.0 | -1021467000.0 | -1134691000.0 | -1183888000.0 | -1295109000.0 |
| Repayment Of Debt | | -1130000000.0 | -1230000000.0 | -6080660000.0 | -9154819000.0 | -10838938000.0 |
| Repurchase Of Capital Stock | -200000000.0 | 0.0 | 0.0 | | | |
| Sale Of Business | 17789000.0 | 0.0 | 0.0 | | | |
| Sale Of Investment | | 4902000.0 | 1496000.0 | 136000.0 | -168000.0 | 558000.0 |
| Sale Of Investment Properties | | 834770000.0 | 517000.0 | 6688000.0 | 22442000.0 | 682514000.0 |
| Short Term Debt Issuance | | 0.0 | 0.0 | 5363333000.0 | | 8656025000.0 |
| Short Term Debt Payments | | 0.0 | 0.0 | -4863333000.0 | | -8406025000.0 |
| Stock Based Compensation | | 52026000.0 | 51478000.0 | 43949000.0 | 43622000.0 | 44334000.0 |
| Unrealized Gain Loss On Investment Securities | 0.0 | 150000.0 | -239000.0 | | | |