Document and Entity Information	Nov. 28, 2023
Entity Listings [Line Items]
Document Type	8-K
Amendment Flag	false
Document Period End Date	Nov. 28, 2023
Current Fiscal Year End Date	--12-31
Entity File Number	001-35522
Entity Registrant Name	BANC OF CALIFORNIA, INC.
Entity Central Index Key	0001169770
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	04-3639825
Entity Address, Address Line One	11611 San Vicente Boulevard
Entity Address, Address Line Two	Suite 500
Entity Address, City or Town	Los Angeles
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	90049
City Area Code	855
Local Phone Number	361-2262
Entity Emerging Growth Company	false
Written Communications	false
Soliciting Material	false
Pre-commencement Tender Offer	false
Pre-commencement Issuer Tender Offer	false
Common Stock [Member]
Entity Listings [Line Items]
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	BANC
Security Exchange Name	NYSE
Depositary Shares, each representing a 1/40th interest in a share of 7.75% non-cumulative perpetual preferred stock, Series F [Member]
Entity Listings [Line Items]
Title of 12(b) Security	Depositary Shares, each representing a 1/40th interest in a share of 7.75% non-cumulative perpetual preferred stock, Series F
Trading Symbol	BANC PRF
Security Exchange Name	NYSE