Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001490906-25-000021-index-headers.html | 2025-08-08 11:49:06 | |
| 0001490906-25-000021-index.html | 2025-08-08 11:49:06 | |
| 0001490906-25-000021.txt | 2025-08-08 11:49:06 | |
 0001490906-25-000021-xbrl.zip | 344665 | 2025-08-08 11:49:06 |
| cffn-063025xex311.htm | 10168 | 2025-08-08 11:49:06 |
| cffn-063025xex312.htm | 10013 | 2025-08-08 11:49:06 |
| cffn-063025xex32.htm | 8965 | 2025-08-08 11:49:06 |
| cffn-20250630.htm | 4922651 | 2025-08-08 11:49:06 |
| cffn-20250630.xsd | 33038 | 2025-08-08 11:49:06 |
| cffn-20250630_cal.xml | 101683 | 2025-08-08 11:49:06 |
| cffn-20250630_def.xml | 333736 | 2025-08-08 11:49:06 |
| cffn-20250630_htm.xml | 4305493 | 2025-08-08 11:49:06 |
| cffn-20250630_lab.xml | 504357 | 2025-08-08 11:49:06 |
| cffn-20250630_pre.xml | 471831 | 2025-08-08 11:49:06 |
| FilingSummary.xml | 33088 | 2025-08-08 11:49:06 |
| MetaLinks.json | 833236 | 2025-08-08 11:49:06 |
| R1.htm | 51665 | 2025-08-08 11:49:06 |
| R10.htm | 17086 | 2025-08-08 11:49:06 |
| R11.htm | 34219 | 2025-08-08 11:49:06 |
| R12.htm | 105035 | 2025-08-08 11:49:06 |
| R13.htm | 1203972 | 2025-08-08 11:49:06 |
| R14.htm | 13425 | 2025-08-08 11:49:06 |
| R15.htm | 12216 | 2025-08-08 11:49:06 |
| R16.htm | 117543 | 2025-08-08 11:49:06 |
| R17.htm | 64831 | 2025-08-08 11:49:06 |
| R18.htm | 16670 | 2025-08-08 11:49:06 |
| R19.htm | 33700 | 2025-08-08 11:49:06 |
| R2.htm | 84550 | 2025-08-08 11:49:06 |
| R20.htm | 111012 | 2025-08-08 11:49:06 |
| R21.htm | 1196431 | 2025-08-08 11:49:06 |
| R22.htm | 100851 | 2025-08-08 11:49:06 |
| R23.htm | 64299 | 2025-08-08 11:49:06 |
| R24.htm | 60835 | 2025-08-08 11:49:06 |
| R25.htm | 22185 | 2025-08-08 11:49:06 |
| R26.htm | 21141 | 2025-08-08 11:49:06 |
| R27.htm | 24423 | 2025-08-08 11:49:06 |
| R28.htm | 22257 | 2025-08-08 11:49:06 |
| R29.htm | 10152 | 2025-08-08 11:49:06 |
| R3.htm | 28647 | 2025-08-08 11:49:06 |
| R30.htm | 10857 | 2025-08-08 11:49:06 |
| R31.htm | 33634 | 2025-08-08 11:49:06 |
| R32.htm | 48845 | 2025-08-08 11:49:06 |
| R33.htm | 152218 | 2025-08-08 11:49:06 |
| R34.htm | 156591 | 2025-08-08 11:49:06 |
| R35.htm | 89994 | 2025-08-08 11:49:06 |
| R36.htm | 74397 | 2025-08-08 11:49:06 |
| R37.htm | 32340 | 2025-08-08 11:49:06 |
| R38.htm | 90202 | 2025-08-08 11:49:06 |
| R39.htm | 24843 | 2025-08-08 11:49:06 |
| R4.htm | 127774 | 2025-08-08 11:49:06 |
| R40.htm | 47599 | 2025-08-08 11:49:06 |
| R41.htm | 65345 | 2025-08-08 11:49:06 |
| R42.htm | 51614 | 2025-08-08 11:49:06 |
| R43.htm | 13845 | 2025-08-08 11:49:06 |
| R44.htm | 36667 | 2025-08-08 11:49:06 |
| R45.htm | 16331 | 2025-08-08 11:49:06 |
| R46.htm | 41168 | 2025-08-08 11:49:06 |
| R47.htm | 53332 | 2025-08-08 11:49:06 |
| R48.htm | 59202 | 2025-08-08 11:49:06 |
| R49.htm | 71975 | 2025-08-08 11:49:06 |
| R5.htm | 33116 | 2025-08-08 11:49:06 |
| R6.htm | 12375 | 2025-08-08 11:49:06 |
| R7.htm | 73747 | 2025-08-08 11:49:06 |
| R8.htm | 4951 | 2025-08-08 11:49:06 |
| R9.htm | 114292 | 2025-08-08 11:49:06 |
| report.css | 2767 | 2025-08-08 11:49:06 |
| Show.js | 1085 | 2025-08-08 11:49:06 |