Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000350894-25-000071-index-headers.html | 2025-04-28 13:57:07 | |
| 0000350894-25-000071-index.html | 2025-04-28 13:57:07 | |
| 0000350894-25-000071.txt | 2025-04-28 13:57:07 | |
 0000350894-25-000071-xbrl.zip | 271248 | 2025-04-28 13:57:07 |
| FilingSummary.xml | 41671 | 2025-04-28 13:57:07 |
| Financial_Report.xlsx | 111740 | 2025-04-28 13:57:07 |
| MetaLinks.json | 1000429 | 2025-04-28 13:57:07 |
| R1.htm | 51528 | 2025-04-28 13:57:07 |
| R10.htm | 25271 | 2025-04-28 13:57:07 |
| R11.htm | 38896 | 2025-04-28 13:57:07 |
| R12.htm | 65503 | 2025-04-28 13:57:07 |
| R13.htm | 61050 | 2025-04-28 13:57:07 |
| R14.htm | 13634 | 2025-04-28 13:57:07 |
| R15.htm | 20963 | 2025-04-28 13:57:07 |
| R16.htm | 18044 | 2025-04-28 13:57:07 |
| R17.htm | 109411 | 2025-04-28 13:57:07 |
| R18.htm | 31296 | 2025-04-28 13:57:07 |
| R19.htm | 21735 | 2025-04-28 13:57:07 |
| R2.htm | 123380 | 2025-04-28 13:57:07 |
| R20.htm | 24577 | 2025-04-28 13:57:07 |
| R21.htm | 118186 | 2025-04-28 13:57:07 |
| R22.htm | 20229 | 2025-04-28 13:57:07 |
| R23.htm | 14486 | 2025-04-28 13:57:07 |
| R24.htm | 8465 | 2025-04-28 13:57:07 |
| R25.htm | 46638 | 2025-04-28 13:57:07 |
| R26.htm | 16135 | 2025-04-28 13:57:07 |
| R27.htm | 21574 | 2025-04-28 13:57:07 |
| R28.htm | 39982 | 2025-04-28 13:57:07 |
| R29.htm | 63451 | 2025-04-28 13:57:07 |
| R3.htm | 23848 | 2025-04-28 13:57:07 |
| R30.htm | 61389 | 2025-04-28 13:57:07 |
| R31.htm | 11730 | 2025-04-28 13:57:07 |
| R32.htm | 17528 | 2025-04-28 13:57:07 |
| R33.htm | 103818 | 2025-04-28 13:57:07 |
| R34.htm | 28501 | 2025-04-28 13:57:07 |
| R35.htm | 24702 | 2025-04-28 13:57:07 |
| R36.htm | 105302 | 2025-04-28 13:57:07 |
| R37.htm | 21309 | 2025-04-28 13:57:07 |
| R38.htm | 41075 | 2025-04-28 13:57:07 |
| R39.htm | 35653 | 2025-04-28 13:57:07 |
| R4.htm | 93390 | 2025-04-28 13:57:07 |
| R40.htm | 21425 | 2025-04-28 13:57:07 |
| R41.htm | 27944 | 2025-04-28 13:57:07 |
| R42.htm | 53258 | 2025-04-28 13:57:07 |
| R43.htm | 14739 | 2025-04-28 13:57:07 |
| R44.htm | 25582 | 2025-04-28 13:57:07 |
| R45.htm | 12616 | 2025-04-28 13:57:07 |
| R46.htm | 17239 | 2025-04-28 13:57:07 |
| R47.htm | 46124 | 2025-04-28 13:57:07 |
| R48.htm | 38989 | 2025-04-28 13:57:07 |
| R49.htm | 40368 | 2025-04-28 13:57:07 |
| R5.htm | 33593 | 2025-04-28 13:57:07 |
| R50.htm | 39768 | 2025-04-28 13:57:07 |
| R51.htm | 30879 | 2025-04-28 13:57:07 |
| R52.htm | 41823 | 2025-04-28 13:57:07 |
| R53.htm | 8406 | 2025-04-28 13:57:07 |
| R54.htm | 37604 | 2025-04-28 13:57:07 |
| R55.htm | 26469 | 2025-04-28 13:57:07 |
| R56.htm | 13993 | 2025-04-28 13:57:07 |
| R57.htm | 50505 | 2025-04-28 13:57:07 |
| R58.htm | 16563 | 2025-04-28 13:57:07 |
| R59.htm | 27668 | 2025-04-28 13:57:07 |
| R6.htm | 7385 | 2025-04-28 13:57:07 |
| R60.htm | 13117 | 2025-04-28 13:57:07 |
| R61.htm | 13023 | 2025-04-28 13:57:07 |
| R62.htm | 18535 | 2025-04-28 13:57:07 |
| R63.htm | 40226 | 2025-04-28 13:57:07 |
| R64.htm | 25319 | 2025-04-28 13:57:07 |
| R65.htm | 21426 | 2025-04-28 13:57:07 |
| R66.htm | 109029 | 2025-04-28 13:57:07 |
| R67.htm | 6836 | 2025-04-28 13:57:07 |
| R68.htm | 51431 | 2025-04-28 13:57:07 |
| R7.htm | 54486 | 2025-04-28 13:57:07 |
| R8.htm | 102295 | 2025-04-28 13:57:07 |
| R9.htm | 33235 | 2025-04-28 13:57:07 |
| report.css | 2767 | 2025-04-28 13:57:07 |
| seic-0331202510qex311.htm | 7553 | 2025-04-28 13:57:07 |
| seic-0331202510qex312.htm | 7768 | 2025-04-28 13:57:07 |
| seic-0331202510qex32.htm | 6295 | 2025-04-28 13:57:07 |
| seic-20250331.htm | 1541168 | 2025-04-28 13:57:07 |
| seic-20250331.xsd | 52319 | 2025-04-28 13:57:07 |
| seic-20250331_cal.xml | 123400 | 2025-04-28 13:57:07 |
| seic-20250331_def.xml | 256066 | 2025-04-28 13:57:07 |
 seic-20250331_g1.gif | 15713 | 2025-04-28 13:57:07 |
| seic-20250331_htm.xml | 1414015 | 2025-04-28 13:57:07 |
| seic-20250331_lab.xml | 707864 | 2025-04-28 13:57:07 |
| seic-20250331_pre.xml | 494125 | 2025-04-28 13:57:07 |
| Show.js | 1085 | 2025-04-28 13:57:07 |