| Cover | Jun. 21, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jun. 21, 2024 |
| Entity File Number | 000-09341 |
| Entity Registrant Name | SECURITY NATIONAL FINANCIAL CORPORATION |
| Entity Central Index Key | 0000318673 |
| Entity Tax Identification Number | 87-0345941 |
| Entity Incorporation, State or Country Code | UT |
| Entity Address, Address Line One | 433 Ascension Way |
| Entity Address, Address Line Two | 6th Floor |
| Entity Address, City or Town | Salt Lake City |
| Entity Address, State or Province | UT |
| Entity Address, Postal Zip Code | 84123 |
| City Area Code | (801) |
| Local Phone Number | 264-1060 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Class A Common Stock |
| Trading Symbol | SNFCA |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
