Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000731802-26-000013-index-headers.html | 2026-02-03 17:00:18 | |
| 0000731802-26-000013-index.html | 2026-02-03 17:00:18 | |
| 0000731802-26-000013.txt | 2026-02-03 17:00:18 | |
 0000731802-26-000013-xbrl.zip | 227788 | 2026-02-03 17:00:18 |
| ato-20251231.htm | 1338244 | 2026-02-03 17:00:18 |
| ato-20251231.xsd | 51681 | 2026-02-03 17:00:18 |
| ato-20251231_cal.xml | 66174 | 2026-02-03 17:00:18 |
| ato-20251231_def.xml | 250496 | 2026-02-03 17:00:18 |
| ato-20251231_htm.xml | 1469453 | 2026-02-03 17:00:18 |
| ato-20251231_lab.xml | 629615 | 2026-02-03 17:00:18 |
| ato-20251231_pre.xml | 441228 | 2026-02-03 17:00:18 |
| ato20251231ex-15.htm | 3282 | 2026-02-03 17:00:18 |
| ato20251231ex-31.htm | 18553 | 2026-02-03 17:00:18 |
| ato20251231ex-32.htm | 11169 | 2026-02-03 17:00:18 |
| FilingSummary.xml | 37156 | 2026-02-03 17:00:18 |
| MetaLinks.json | 1006589 | 2026-02-03 17:00:18 |
| R1.htm | 53078 | 2026-02-03 17:00:18 |
| R10.htm | 97893 | 2026-02-03 17:00:18 |
| R11.htm | 28960 | 2026-02-03 17:00:18 |
| R12.htm | 55911 | 2026-02-03 17:00:18 |
| R13.htm | 49132 | 2026-02-03 17:00:18 |
| R14.htm | 124680 | 2026-02-03 17:00:18 |
| R15.htm | 30448 | 2026-02-03 17:00:18 |
| R16.htm | 33987 | 2026-02-03 17:00:18 |
| R17.htm | 10902 | 2026-02-03 17:00:18 |
| R18.htm | 10851 | 2026-02-03 17:00:18 |
| R19.htm | 60914 | 2026-02-03 17:00:18 |
| R2.htm | 109844 | 2026-02-03 17:00:18 |
| R20.htm | 79708 | 2026-02-03 17:00:18 |
| R21.htm | 7129 | 2026-02-03 17:00:18 |
| R22.htm | 8465 | 2026-02-03 17:00:18 |
| R23.htm | 15529 | 2026-02-03 17:00:18 |
| R24.htm | 58921 | 2026-02-03 17:00:18 |
| R25.htm | 89620 | 2026-02-03 17:00:18 |
| R26.htm | 27408 | 2026-02-03 17:00:18 |
| R27.htm | 52467 | 2026-02-03 17:00:18 |
| R28.htm | 38275 | 2026-02-03 17:00:18 |
| R29.htm | 122779 | 2026-02-03 17:00:18 |
| R3.htm | 12064 | 2026-02-03 17:00:18 |
| R30.htm | 28058 | 2026-02-03 17:00:18 |
| R31.htm | 30931 | 2026-02-03 17:00:18 |
| R32.htm | 49375 | 2026-02-03 17:00:18 |
| R33.htm | 72370 | 2026-02-03 17:00:18 |
| R34.htm | 7320 | 2026-02-03 17:00:18 |
| R35.htm | 37787 | 2026-02-03 17:00:18 |
| R36.htm | 6478 | 2026-02-03 17:00:18 |
| R37.htm | 63866 | 2026-02-03 17:00:18 |
| R38.htm | 25350 | 2026-02-03 17:00:18 |
| R39.htm | 58285 | 2026-02-03 17:00:18 |
| R4.htm | 107095 | 2026-02-03 17:00:18 |
| R40.htm | 56764 | 2026-02-03 17:00:18 |
| R41.htm | 10221 | 2026-02-03 17:00:18 |
| R42.htm | 12725 | 2026-02-03 17:00:18 |
| R43.htm | 77188 | 2026-02-03 17:00:18 |
| R44.htm | 81931 | 2026-02-03 17:00:18 |
| R45.htm | 61257 | 2026-02-03 17:00:18 |
| R46.htm | 26255 | 2026-02-03 17:00:18 |
| R47.htm | 17210 | 2026-02-03 17:00:18 |
| R48.htm | 30924 | 2026-02-03 17:00:18 |
| R49.htm | 33031 | 2026-02-03 17:00:18 |
| R5.htm | 7305 | 2026-02-03 17:00:18 |
| R50.htm | 21081 | 2026-02-03 17:00:18 |
| R51.htm | 32311 | 2026-02-03 17:00:18 |
| R52.htm | 31652 | 2026-02-03 17:00:18 |
| R53.htm | 28795 | 2026-02-03 17:00:18 |
| R54.htm | 28007 | 2026-02-03 17:00:18 |
| R55.htm | 26554 | 2026-02-03 17:00:18 |
| R56.htm | 23484 | 2026-02-03 17:00:18 |
| R57.htm | 10316 | 2026-02-03 17:00:18 |
| R58.htm | 7707 | 2026-02-03 17:00:18 |
| R59.htm | 80007 | 2026-02-03 17:00:18 |
| R6.htm | 66781 | 2026-02-03 17:00:18 |
| R60.htm | 7774 | 2026-02-03 17:00:18 |
| R61.htm | 9642 | 2026-02-03 17:00:18 |
| R7.htm | 7022 | 2026-02-03 17:00:18 |
| R8.htm | 8595 | 2026-02-03 17:00:18 |
| R9.htm | 31417 | 2026-02-03 17:00:18 |
| report.css | 2767 | 2026-02-03 17:00:18 |
| Show.js | 1085 | 2026-02-03 17:00:18 |