| | 2019-12-31 | 2020-12-31 | 2021-12-31 | 2022-12-31 | 2023-12-31 | 2024-09-30 |
| Beginning Cash Position | | 274253000.0 | 608050000.0 | 625567000.0 | 572664000.0 | 588896000.0 |
| Capital Expenditure | | -45628000.0 | -50616000.0 | -51872000.0 | -52448000.0 | -58908000.0 |
| Capital Expenditure Reported | | -30618000.0 | -33123000.0 | -38730000.0 | -43122000.0 | -47110000.0 |
| Cash Dividends Paid | | -90566000.0 | -99792000.0 | -105942000.0 | -109658000.0 | -112518000.0 |
| Cash Flow From Continuing Financing Activities | | -145112000.0 | -189775000.0 | -242378000.0 | -147057000.0 | -192745000.0 |
| Cash Flow From Continuing Investing Activities | | 68867000.0 | -67694000.0 | -86272000.0 | -155290000.0 | -166941000.0 |
| Cash Flow From Continuing Operating Activities | | 404489000.0 | 282091000.0 | 289231000.0 | 333767000.0 | 350674000.0 |
| Change In Account Payable | | 139332000.0 | 96214000.0 | 86052000.0 | 220691000.0 | -94331000.0 |
| Change In Accrued Expense | | 14961000.0 | -2607000.0 | -3417000.0 | 1466000.0 | 6077000.0 |
| Change In Income Tax Payable | | 16189000.0 | -5638000.0 | -4768000.0 | -14691000.0 | -15920000.0 |
| Change In Other Current Assets | | 67952000.0 | -5574000.0 | -49527000.0 | -25248000.0 | -1577000.0 |
| Change In Other Current Liabilities | | -5788000.0 | -7001000.0 | -6373000.0 | -6735000.0 | -8660000.0 |
| Change In Other Working Capital | | -2671000.0 | -2306000.0 | 1813000.0 | -1103000.0 | -1480000.0 |
| Change In Payable | | 155521000.0 | 90576000.0 | 81284000.0 | 206000000.0 | -110251000.0 |
| Change In Payables And Accrued Expense | | 170482000.0 | 87969000.0 | 77867000.0 | 207466000.0 | -104174000.0 |
| Change In Prepaid Assets | | -1977000.0 | 2214000.0 | -4249000.0 | -11898000.0 | 9545000.0 |
| Change In Receivables | | -200886000.0 | -141311000.0 | -62767000.0 | -188160000.0 | 66479000.0 |
| Change In Tax Payable | | 16189000.0 | -5638000.0 | -4768000.0 | -14691000.0 | -15920000.0 |
| Change In Working Capital | | 27112000.0 | -66009000.0 | -43236000.0 | -25678000.0 | -39867000.0 |
| Changes In Account Receivables | | -200886000.0 | -141311000.0 | -62767000.0 | -188160000.0 | 66479000.0 |
| Changes In Cash | | 328244000.0 | 24622000.0 | -39419000.0 | 31420000.0 | -9012000.0 |
| Common Stock Dividend Paid | | -90566000.0 | -99792000.0 | -105942000.0 | -109658000.0 | -112518000.0 |
| Common Stock Payments | | -16135000.0 | -63189000.0 | -87540000.0 | 0.0 | -58629000.0 |
| Deferred Income Tax | | 10099000.0 | 3118000.0 | -6547000.0 | -5815000.0 | -2136000.0 |
| Deferred Tax | | 10099000.0 | 3118000.0 | -6547000.0 | -5815000.0 | -2136000.0 |
| Depreciation | | 42838000.0 | 60246000.0 | 67154000.0 | 76410000.0 | 81485000.0 |
| Depreciation Amortization Depletion | | 42838000.0 | 60246000.0 | 67154000.0 | 76410000.0 | 81485000.0 |
| Depreciation And Amortization | | 42838000.0 | 60246000.0 | 67154000.0 | 76410000.0 | 81485000.0 |
| Effect Of Exchange Rate Changes | | 5553000.0 | -7105000.0 | -13484000.0 | 7588000.0 | 20121000.0 |
| End Cash Position | | 608050000.0 | 625567000.0 | 572664000.0 | 611672000.0 | 579884000.0 |
| Financing Cash Flow | | -145112000.0 | -189775000.0 | -242378000.0 | -147057000.0 | -192745000.0 |
| Free Cash Flow | | 358861000.0 | 231475000.0 | 237359000.0 | 281319000.0 | 291766000.0 |
| Income Tax Paid Supplemental Data | | 45046000.0 | 70003000.0 | 88677000.0 | 94814000.0 | 87716000.0 |
| Interest Paid Supplemental Data | | 1142000.0 | 830000.0 | 652000.0 | 1870000.0 | 2873000.0 |
| Investing Cash Flow | | 68867000.0 | -67694000.0 | -86272000.0 | -155290000.0 | -166941000.0 |
| Issuance Of Debt | | 578356000.0 | 70348000.0 | 100000000.0 | 123995000.0 | 414925000.0 |
| Net Business Purchase And Sale | | -23297000.0 | -17078000.0 | -34400000.0 | -78476000.0 | |
| Net Common Stock Issuance | | -16135000.0 | -63189000.0 | -87540000.0 | 0.0 | -58629000.0 |
| Net Foreign Currency Exchange Gain Loss | | | 0.0 | -8783000.0 | 4718000.0 | 8926000.0 |
| Net Income From Continuing Operations | | 299377000.0 | 257888000.0 | 250224000.0 | 258055000.0 | 278669000.0 |
| Net Investment Purchase And Sale | | 137792000.0 | 0.0 | 0.0 | -24366000.0 | -29557000.0 |
| Net Issuance Payments Of Debt | | 0.0 | 0.0 | 0.0 | 0.0 | -3995000.0 |
| Net Other Financing Charges | | -42418000.0 | -33890000.0 | -49568000.0 | -38339000.0 | -20239000.0 |
| Net Other Investing Changes | -30000.0 | | | | | |
| Net PPEPurchase And Sale | | -15010000.0 | -17493000.0 | -13142000.0 | -9326000.0 | -11798000.0 |
| Net Short Term Debt Issuance | | 0.0 | 0.0 | 0.0 | 0.0 | -3995000.0 |
| Operating Cash Flow | | 404489000.0 | 282091000.0 | 289231000.0 | 333767000.0 | 350674000.0 |
| Operating Gains Losses | | | | -8783000.0 | 4718000.0 | 8926000.0 |
| Other Non Cash Items | | -550000.0 | -466000.0 | 555000.0 | -3113000.0 | -6799000.0 |
| Proceeds From Stock Option Exercised | | 4007000.0 | 7096000.0 | 672000.0 | 940000.0 | 2636000.0 |
| Purchase Of Business | | -23297000.0 | -17078000.0 | -34400000.0 | -78476000.0 | |
| Purchase Of Investment | | -32865000.0 | 0.0 | 0.0 | -28818000.0 | -39693000.0 |
| Purchase Of PPE | | -15010000.0 | -17493000.0 | -13142000.0 | -9326000.0 | -11798000.0 |
| Repayment Of Debt | | -578356000.0 | -70348000.0 | -100000000.0 | -123995000.0 | -418920000.0 |
| Repurchase Of Capital Stock | | -16135000.0 | -63189000.0 | -87540000.0 | 0.0 | -58629000.0 |
| Sale Of Investment | | 170657000.0 | 0.0 | 0.0 | 4452000.0 | 10136000.0 |
| Short Term Debt Issuance | | 578356000.0 | 70348000.0 | 100000000.0 | 123995000.0 | 414925000.0 |
| Short Term Debt Payments | | -578356000.0 | -70348000.0 | -100000000.0 | -123995000.0 | -418920000.0 |
| Stock Based Compensation | | 25613000.0 | 27314000.0 | 29864000.0 | 29190000.0 | 30396000.0 |
