Cover Page
Jan. 21, 2022
Entity Information [Line Items]  
Document Type 8-K
Document Period End Date Jan. 21, 2022
Entity Incorporation, State or Country Code MD
Entity File Number 001-39123
Entity Registrant Name SILVERGATE CAPITAL CORPORATION
Entity Tax Identification Number 33-0227337
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
Entity Emerging Growth Company false
Amendment Flag false
Entity Central Index Key 0001312109
Class A Common Stock, par value $0.01 per share  
Entity Information [Line Items]  
Title of 12(b) Security Class A Common Stock, par value $0.01 per share
Trading Symbol SI
Security Exchange Name NYSE
Depositary Shares, Each Representing a 1/40th Interest in a Share of 5.375% Fixed Rate Non-Cumulative Perpetual Preferred Stock, Series A  
Entity Information [Line Items]  
Title of 12(b) Security Depositary Shares, Each Representing a 1/40th Interest in a Share of 5.375% Fixed Rate Non-Cumulative Perpetual Preferred Stock, Series A
Trading Symbol SI PRA
Security Exchange Name NYSE