| | 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 | 0.0 | | 7425000.0 |
| Beginning Cash Position | | 175163000.0 | 96348000.0 | 260004000.0 | 113817000.0 | 135443000.0 |
| Capital Expenditure | | -416701000.0 | -311120000.0 | -246760000.0 | -247262000.0 | -291338000.0 |
| Capital Expenditure Reported | | -416701000.0 | -311120000.0 | -246760000.0 | -247262000.0 | -291338000.0 |
| Cash Dividends Paid | | -347284000.0 | -359194000.0 | -371586000.0 | -380209000.0 | -388058000.0 |
| Cash Flow From Continuing Financing Activities | | 190414000.0 | -33849000.0 | -252298000.0 | -193091000.0 | 102953000.0 |
| Cash Flow From Continuing Investing Activities | | -785998000.0 | -358325000.0 | -446826000.0 | -310521000.0 | -743068000.0 |
| Cash Flow From Continuing Operating Activities | | 516769000.0 | 555830000.0 | 574563000.0 | 593417000.0 | 622378000.0 |
| Change In Other Current Liabilities | | 10373000.0 | 235000.0 | 1741000.0 | 8741000.0 | 2913000.0 |
| Change In Other Working Capital | 10712000.0 | 10373000.0 | | | | |
| Change In Payables And Accrued Expense | | 77000.0 | 6005000.0 | 1550000.0 | -3638000.0 | 5588000.0 |
| Change In Prepaid Assets | | -1219000.0 | -6881000.0 | -5030000.0 | -4781000.0 | -4766000.0 |
| Change In Receivables | | -12071000.0 | 3468000.0 | -796000.0 | -2381000.0 | 2417000.0 |
| Change In Working Capital | | -2840000.0 | 2827000.0 | -2535000.0 | -2059000.0 | 6152000.0 |
| Changes In Account Receivables | | -12071000.0 | 3468000.0 | -796000.0 | -2381000.0 | 2417000.0 |
| Changes In Cash | | -78815000.0 | 163656000.0 | -124561000.0 | 89805000.0 | -17737000.0 |
| Common Stock Issuance | | 307275000.0 | 131895000.0 | 304045000.0 | 287610000.0 | 54466000.0 |
| Common Stock Payments | | -4900000.0 | -5019000.0 | -6709000.0 | -6698000.0 | -4911000.0 |
| Deferred Income Tax | | | 0.0 | 0.0 | | -14176000.0 |
| Deferred Tax | | | 0.0 | 0.0 | | -14176000.0 |
| Depreciation | 279976000.0 | 302409000.0 | | | | |
| Depreciation Amortization Depletion | | 302409000.0 | 321763000.0 | 342598000.0 | 350332000.0 | 367842000.0 |
| Depreciation And Amortization | | 302409000.0 | 321763000.0 | 342598000.0 | 350332000.0 | 367842000.0 |
| Dividends Received CFI | | 6864000.0 | 9860000.0 | 4742000.0 | 3694000.0 | 4109000.0 |
| Earnings Losses From Equity Investments | | -5170000.0 | -3869000.0 | -3160000.0 | -3305000.0 | -1920000.0 |
| End Cash Position | | 96348000.0 | 260004000.0 | 135443000.0 | 203622000.0 | 117706000.0 |
| Financing Cash Flow | | 190414000.0 | -33849000.0 | -252298000.0 | -193091000.0 | 102953000.0 |
| Free Cash Flow | | 100068000.0 | 244710000.0 | 327803000.0 | 346155000.0 | 331040000.0 |
| Gain Loss On Investment Securities | | -93483000.0 | -9881000.0 | -54040000.0 | -79432000.0 | -150111000.0 |
| Gain Loss On Sale Of Business | 0.0 | -70374000.0 | 0.0 | 0.0 | | |
| Income Tax Paid Supplemental Data | | 624000.0 | 284000.0 | 177000.0 | | 369000.0 |
| Interest Paid Supplemental Data | | 130912000.0 | 158796000.0 | 169333000.0 | | 171945000.0 |
| Investing Cash Flow | | -785998000.0 | -358325000.0 | -446826000.0 | -310521000.0 | -743068000.0 |
| Issuance Of Capital Stock | | 307275000.0 | 131895000.0 | 304045000.0 | 287610000.0 | 54466000.0 |
| Issuance Of Debt | | 298568000.0 | 544935000.0 | 471507000.0 | -64200000.0 | 467661000.0 |
| Long Term Debt Issuance | | 298568000.0 | 544935000.0 | 471507000.0 | -64200000.0 | 467661000.0 |
| Long Term Debt Payments | | -19443000.0 | -333472000.0 | -604398000.0 | -5598000.0 | -7662000.0 |
| Net Business Purchase And Sale | | -27347000.0 | 0.0 | 0.0 | | -698000.0 |
| Net Common Stock Issuance | | 302375000.0 | 126876000.0 | 297336000.0 | 280912000.0 | 49555000.0 |
| Net Income From Continuing Operations | | 395661000.0 | 247217000.0 | 304334000.0 | 358197000.0 | 423648000.0 |
| Net Investment Properties Purchase And Sale | | -304777000.0 | -32177000.0 | -173999000.0 | -35710000.0 | -429646000.0 |
| Net Issuance Payments Of Debt | | 279125000.0 | 211463000.0 | -132891000.0 | -69798000.0 | 459999000.0 |
| Net Long Term Debt Issuance | | 279125000.0 | 211463000.0 | -132891000.0 | -69798000.0 | 459999000.0 |
| Net Other Financing Charges | | -43802000.0 | -12994000.0 | -45157000.0 | -23996000.0 | -18543000.0 |
| Net Other Investing Changes | | -44037000.0 | -24888000.0 | -30809000.0 | -31243000.0 | -25495000.0 |
| Operating Cash Flow | | 516769000.0 | 555830000.0 | 574563000.0 | 593417000.0 | 622378000.0 |
| Operating Gains Losses | | -169027000.0 | -13750000.0 | -57200000.0 | -82737000.0 | -152031000.0 |
| Other Non Cash Items | | -23138000.0 | -16535000.0 | -28991000.0 | -32322000.0 | -31090000.0 |
| Purchase Of Business | | -27347000.0 | 0.0 | 0.0 | | -698000.0 |
| Purchase Of Investment Properties | | -438494000.0 | -60628000.0 | -273927000.0 | -180465000.0 | -735274000.0 |
| Repayment Of Debt | | -19443000.0 | -333472000.0 | -604398000.0 | -5598000.0 | -7662000.0 |
| Repurchase Of Capital Stock | | -4900000.0 | -5019000.0 | -6709000.0 | -6698000.0 | -4911000.0 |
| Sale Of Investment Properties | | 133717000.0 | 28451000.0 | 99928000.0 | 144755000.0 | 305628000.0 |
| Stock Based Compensation | | 13704000.0 | 14308000.0 | 16357000.0 | 16182000.0 | 14608000.0 |