| | 2021-12-31 | 2022-12-31 | 2023-12-31 | 2024-12-31 | 2025-06-30 | 2025-12-31 |
| Amortization Cash Flow | | -13591000.0 | -17253000.0 | -25205000.0 | | -30744000.0 |
| Amortization Of Intangibles | | -13591000.0 | -17253000.0 | -25205000.0 | | -30744000.0 |
| Asset Impairment Charge | | 21958000.0 | 14043000.0 | 4476000.0 | 8753000.0 | 9517000.0 |
| Beginning Cash Position | | 334663000.0 | 149829000.0 | 783757000.0 | 127555000.0 | 689731000.0 |
| Cash Dividends Paid | | -544740000.0 | -657460000.0 | -685899000.0 | -702125000.0 | -714576000.0 |
| Cash Flow From Continuing Financing Activities | | -982731000.0 | -300696000.0 | -781106000.0 | -423272000.0 | -1220137000.0 |
| Cash Flow From Continuing Investing Activities | | -63217000.0 | -136983000.0 | -318541000.0 | -541144000.0 | -376815000.0 |
| Cash Flow From Continuing Operating Activities | | 861114000.0 | 1071607000.0 | 1005621000.0 | 1064687000.0 | 1120015000.0 |
| Change In Other Current Assets | | | -25767000.0 | -3974000.0 | | -18832000.0 |
| Change In Other Current Liabilities | | | 5882000.0 | -18369000.0 | | 5899000.0 |
| Change In Other Working Capital | 46638000.0 | -24208000.0 | -19885000.0 | -22343000.0 | -36319000.0 | |
| Change In Payables And Accrued Expense | | 37655000.0 | 5826000.0 | -21742000.0 | -57086000.0 | -5335000.0 |
| Change In Receivables | | -9104000.0 | 18453000.0 | 5993000.0 | -11867000.0 | 130000.0 |
| Change In Working Capital | | 4343000.0 | 4394000.0 | -38092000.0 | -105272000.0 | -18138000.0 |
| Changes In Cash | | -184834000.0 | 633928000.0 | -94026000.0 | 100271000.0 | -476937000.0 |
| Common Stock Issuance | | 15513000.0 | 3727000.0 | 135796000.0 | | 0.0 |
| Common Stock Payments | | | 0.0 | 0.0 | | -120329000.0 |
| Depreciation | | 505000000.0 | 507265000.0 | 603685000.0 | | 627090000.0 |
| Depreciation Amortization Depletion | | 505000000.0 | 507265000.0 | 603685000.0 | 615594000.0 | 596346000.0 |
| Depreciation And Amortization | | 505000000.0 | 507265000.0 | 603685000.0 | 615594000.0 | 596346000.0 |
| Dividend Received CFO | | 83553000.0 | 75827000.0 | 97723000.0 | 89720000.0 | 96474000.0 |
| Earnings Losses From Equity Investments | | -126884000.0 | -82987000.0 | -93648000.0 | -91085000.0 | -100221000.0 |
| End Cash Position | | 149829000.0 | 783757000.0 | 689731000.0 | 227826000.0 | 212794000.0 |
| Financing Cash Flow | | -982731000.0 | -300696000.0 | -781106000.0 | -423272000.0 | -1220137000.0 |
| Free Cash Flow | | 861114000.0 | 1071607000.0 | 1005621000.0 | 1064687000.0 | 1120015000.0 |
| Gain Loss On Investment Securities | | 300329000.0 | -96972000.0 | 26276000.0 | -46359000.0 | -64959000.0 |
| Income Tax Paid Supplemental Data | | 11869000.0 | 65267000.0 | 60936000.0 | 28904000.0 | 23462000.0 |
| Interest Paid Supplemental Data | | 257979000.0 | 250432000.0 | 301239000.0 | 317734000.0 | 318962000.0 |
| Investing Cash Flow | | -63217000.0 | -136983000.0 | -318541000.0 | -541144000.0 | -376815000.0 |
| Issuance Of Capital Stock | | 15513000.0 | 3727000.0 | 135796000.0 | | 0.0 |
| Issuance Of Debt | | 1269000000.0 | 500000000.0 | 1360000000.0 | 1130000000.0 | 500000000.0 |
| Long Term Debt Issuance | | 1269000000.0 | 500000000.0 | 1360000000.0 | 1130000000.0 | 500000000.0 |
| Long Term Debt Payments | | -1616796000.0 | -60768000.0 | -1490066000.0 | -825540000.0 | -825934000.0 |
| Net Business Purchase And Sale | | -49730000.0 | -10756000.0 | -126184000.0 | 19219000.0 | 12381000.0 |
| Net Common Stock Issuance | | 15513000.0 | 3727000.0 | 135796000.0 | 76952000.0 | -120329000.0 |
| Net Income From Continuing Operations | | 114534000.0 | 665949000.0 | 419439000.0 | 605870000.0 | 592810000.0 |
| Net Investment Properties Purchase And Sale | | -310188000.0 | -381639000.0 | -406128000.0 | -590210000.0 | -457366000.0 |
| Net Investment Purchase And Sale | | 311458000.0 | 273798000.0 | 300297000.0 | -7043000.0 | -11747000.0 |
| Net Issuance Payments Of Debt | | -347796000.0 | 439232000.0 | -130066000.0 | 304460000.0 | -325934000.0 |
| Net Long Term Debt Issuance | | -347796000.0 | 439232000.0 | -130066000.0 | 304460000.0 | -325934000.0 |
| Net Other Financing Charges | | -88588000.0 | -68411000.0 | -58369000.0 | -56511000.0 | -43723000.0 |
| Net Other Investing Changes | | -14757000.0 | -18386000.0 | -86526000.0 | 36890000.0 | 79917000.0 |
| Net Preferred Stock Issuance | | -3441000.0 | -1491000.0 | -26719000.0 | -30199000.0 | -3480000.0 |
| Net Short Term Debt Issuance | 0.0 | | | | | |
| Operating Cash Flow | | 861114000.0 | 1071607000.0 | 1005621000.0 | 1064687000.0 | 1120015000.0 |
| Operating Gains Losses | | 181103000.0 | -179959000.0 | -67372000.0 | -137444000.0 | -165180000.0 |
| Other Non Cash Items | | -76016000.0 | -48966000.0 | -49138000.0 | -47490000.0 | -25039000.0 |
| Preferred Stock Payments | | -3441000.0 | -1491000.0 | -26719000.0 | -30199000.0 | -3480000.0 |
| Proceeds From Stock Option Exercised | | -13679000.0 | -16293000.0 | -15849000.0 | | -12095000.0 |
| Purchase Of Business | | -87301000.0 | -24494000.0 | -153158000.0 | -3782000.0 | -11462000.0 |
| Purchase Of Investment | | -25959000.0 | -23625000.0 | -9466000.0 | -14882000.0 | -18217000.0 |
| Purchase Of Investment Properties | | -494482000.0 | -541703000.0 | -477408000.0 | -593268000.0 | -565993000.0 |
| Repayment Of Debt | | -1616796000.0 | -60768000.0 | -1490066000.0 | -825540000.0 | -825934000.0 |
| Repurchase Of Capital Stock | | -3441000.0 | -1491000.0 | -26719000.0 | -89043000.0 | -123809000.0 |
| Sale Of Business | | 37571000.0 | 13738000.0 | 26974000.0 | 23001000.0 | 23843000.0 |
| Sale Of Investment | | 337417000.0 | 297423000.0 | 309763000.0 | 7839000.0 | 6470000.0 |
| Sale Of Investment Properties | | 184294000.0 | 160064000.0 | 71280000.0 | 3058000.0 | 108627000.0 |
| Stock Based Compensation | | 26639000.0 | 33054000.0 | 34900000.0 | 34956000.0 | 33225000.0 |