Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000046619-25-000062-index-headers.html | 2025-08-27 16:31:46 | |
| 0000046619-25-000062-index.html | 2025-08-27 16:31:46 | |
| 0000046619-25-000062.txt | 2025-08-27 16:31:46 | |
 0000046619-25-000062-xbrl.zip | 234690 | 2025-08-27 16:31:46 |
| a07312025exhibit22.htm | 36581 | 2025-08-27 16:31:46 |
| a07312025exhibit311.htm | 9499 | 2025-08-27 16:31:46 |
| a07312025exhibit312.htm | 9505 | 2025-08-27 16:31:46 |
| a07312025exhibit313.htm | 9485 | 2025-08-27 16:31:46 |
| a07312025exhibit321.htm | 5189 | 2025-08-27 16:31:46 |
| a07312025exhibit322.htm | 5195 | 2025-08-27 16:31:46 |
| a07312025exhibit323.htm | 5274 | 2025-08-27 16:31:46 |
| FilingSummary.xml | 38941 | 2025-08-27 16:31:46 |
| hei-20250731.htm | 1315791 | 2025-08-27 16:31:46 |
| hei-20250731.xsd | 49435 | 2025-08-27 16:31:46 |
| hei-20250731_cal.xml | 91321 | 2025-08-27 16:31:46 |
| hei-20250731_def.xml | 372500 | 2025-08-27 16:31:46 |
| hei-20250731_htm.xml | 1119549 | 2025-08-27 16:31:46 |
| hei-20250731_lab.xml | 591094 | 2025-08-27 16:31:46 |
| hei-20250731_pre.xml | 450835 | 2025-08-27 16:31:46 |
| MetaLinks.json | 912485 | 2025-08-27 16:31:46 |
| R1.htm | 59919 | 2025-08-27 16:31:46 |
| R10.htm | 36390 | 2025-08-27 16:31:46 |
| R11.htm | 49420 | 2025-08-27 16:31:46 |
| R12.htm | 41152 | 2025-08-27 16:31:46 |
| R13.htm | 25700 | 2025-08-27 16:31:46 |
| R14.htm | 79392 | 2025-08-27 16:31:46 |
| R15.htm | 10666 | 2025-08-27 16:31:46 |
| R16.htm | 65717 | 2025-08-27 16:31:46 |
| R17.htm | 25708 | 2025-08-27 16:31:46 |
| R18.htm | 66920 | 2025-08-27 16:31:46 |
| R19.htm | 14851 | 2025-08-27 16:31:46 |
| R2.htm | 150990 | 2025-08-27 16:31:46 |
| R20.htm | 13725 | 2025-08-27 16:31:46 |
| R21.htm | 24037 | 2025-08-27 16:31:46 |
| R22.htm | 54796 | 2025-08-27 16:31:46 |
| R23.htm | 43352 | 2025-08-27 16:31:46 |
| R24.htm | 28996 | 2025-08-27 16:31:46 |
| R25.htm | 81543 | 2025-08-27 16:31:46 |
| R26.htm | 61642 | 2025-08-27 16:31:46 |
| R27.htm | 25096 | 2025-08-27 16:31:46 |
| R28.htm | 62688 | 2025-08-27 16:31:46 |
| R29.htm | 12547 | 2025-08-27 16:31:46 |
| R3.htm | 20075 | 2025-08-27 16:31:46 |
| R30.htm | 47966 | 2025-08-27 16:31:46 |
| R31.htm | 4852 | 2025-08-27 16:31:46 |
| R32.htm | 33538 | 2025-08-27 16:31:46 |
| R33.htm | 48769 | 2025-08-27 16:31:46 |
| R34.htm | 42480 | 2025-08-27 16:31:46 |
| R35.htm | 10191 | 2025-08-27 16:31:46 |
| R36.htm | 11898 | 2025-08-27 16:31:46 |
| R37.htm | 19326 | 2025-08-27 16:31:46 |
| R38.htm | 6572 | 2025-08-27 16:31:46 |
| R39.htm | 15622 | 2025-08-27 16:31:46 |
| R4.htm | 106374 | 2025-08-27 16:31:46 |
| R40.htm | 28863 | 2025-08-27 16:31:46 |
| R41.htm | 57194 | 2025-08-27 16:31:46 |
| R42.htm | 25914 | 2025-08-27 16:31:46 |
| R43.htm | 30847 | 2025-08-27 16:31:46 |
| R44.htm | 28796 | 2025-08-27 16:31:46 |
| R45.htm | 20751 | 2025-08-27 16:31:46 |
| R46.htm | 25744 | 2025-08-27 16:31:46 |
| R47.htm | 37925 | 2025-08-27 16:31:46 |
| R48.htm | 24696 | 2025-08-27 16:31:46 |
| R49.htm | 35853 | 2025-08-27 16:31:46 |
| R5.htm | 48807 | 2025-08-27 16:31:46 |
| R50.htm | 32507 | 2025-08-27 16:31:46 |
| R51.htm | 17676 | 2025-08-27 16:31:46 |
| R52.htm | 7421 | 2025-08-27 16:31:46 |
| R53.htm | 28458 | 2025-08-27 16:31:46 |
| R54.htm | 49760 | 2025-08-27 16:31:46 |
| R55.htm | 18547 | 2025-08-27 16:31:46 |
| R56.htm | 43423 | 2025-08-27 16:31:46 |
| R57.htm | 47187 | 2025-08-27 16:31:46 |
| R58.htm | 41461 | 2025-08-27 16:31:46 |
| R59.htm | 21798 | 2025-08-27 16:31:46 |
| R6.htm | 150560 | 2025-08-27 16:31:46 |
| R60.htm | 11749 | 2025-08-27 16:31:46 |
| R61.htm | 4436 | 2025-08-27 16:31:46 |
| R7.htm | 3235 | 2025-08-27 16:31:46 |
| R8.htm | 102562 | 2025-08-27 16:31:46 |
| R9.htm | 10912 | 2025-08-27 16:31:46 |
| report.css | 2767 | 2025-08-27 16:31:46 |
| Show.js | 1085 | 2025-08-27 16:31:46 |