| Cover | Aug. 03, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K/A |
| Amendment Flag | true |
| Amendment Description | This Current Report on Form 8-K/A (this "Amended 8-K") is being filed solely for the purpose of amending and restating Item 9.01(d) of the Current Report on Form 8-K filed by Silvergate Capital Corporation on August 4, 2021 (the "Original 8-K") to include correct hyperlinks for Exhibits 5.1 and 23.1, which linked to incorrect documents in the Original 8-K. The correct hyperlinks for Exhibits 5.1 and 23.1 are included herein under Item 9.01(d). Except as specifically stated herein, the Original 8-K remains unchanged. In accordance with Rule 12b-15 of the Securities Exchange Act of 1934, as amended, the complete text of Item 9.01(d) of the Original 8-K, as amended by this Amended 8-K, is set forth below. |
| Document Period End Date | Aug. 3, 2021 |
| Entity File Number | 001-39123 |
| Entity Registrant Name | SILVERGATE CAPITAL CORPORATION |
| Entity Central Index Key | 0001312109 |
| Entity Tax Identification Number | 33-0227337 |
| Entity Incorporation, State or Country Code | MD |
| Entity Address, Address Line One | 4250 Executive Square |
| Entity Address, Address Line Two | Suite 300 |
| Entity Address, City or Town | La Jolla |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 92037 |
| City Area Code | 858 |
| Local Phone Number | 362-6300 |
| 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, par value $0.01 per share |
| Trading Symbol | SI |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | true |
