SUBSEQUENT EVENTS	6 Months Ended
SUBSEQUENT EVENTS	Jun. 30, 2023
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTS We have evaluated events from the date of the consolidated financial statements on June 30, 2023 through the issuance of these consolidated financial statements included in this Quarterly Report on Form 10-Q. On July 25, 2023, the Company and PacWest announced the execution of an Agreement and Plan of Merger, pursuant to which (a) a newly formed merger subsidiary of the Company will merge with and into PacWest, with PacWest surviving (the “merger”), (b) immediately following the merger, PacWest will merge into the Company, with the Company surviving (the “second-step merger”), (c) promptly following the second-step merger, Pacific Western Bank, a California-chartered non-member bank and prior to the second-step merger, a wholly-owned subsidiary of PacWest (“PacWest Bank”), will become a member of the Federal Reserve System (the “FRS Membership”) and (d) promptly following the effectiveness of the FRS Membership, the Bank will merge into PacWest Bank, with PacWest Bank surviving as a wholly-owned subsidiary of the Company. Upon closing of the transaction, the combined holding company and bank will operate under the Banc of California name and brand. At the closing of the merger, PacWest stockholders will be entitled to receive 0.6569 of a share of the Company’s common stock for each share held of PacWest common stock. Each outstanding share of PacWest’s 7.75% series A fixed-rate reset noncumulative perpetual preferred stock will be converted into the right to receive one share of a newly created series of substantially identical preferred stock of the Company with the same terms and conditions. In connection with the proposed transaction, the Company also entered into separate investment agreements (the “Investment Agreements”) with affiliates of funds managed by Warburg Pincus LLC (the “Warburg Investors”) and certain investment vehicles sponsored, managed or advised by Centerbridge Partners, L.P. and its affiliates (the “Centerbridge Investors” and, together with the Warburg Investors, the “Investors”), which together will invest a total of $400 million for newly issued equity securities of the Company substantially concurrently with and subject to closing of the transaction. Subject to the terms and conditions of the Investment Agreements, at the closing of the transactions contemplated thereby, the Company expects to issue to the Warburg Investors and the Centerbridge Investors, in the aggregate, approximately 21.8 million shares of common stock at a purchase price of $12.30 per share and 10.8 million shares of a new class of nonvoting, common-equivalent stock at a purchase price of $12.30 per share. Additionally, the Warburg Investors will receive warrants to purchase approximately 15.9 million of the Company’s nonvoting, common-equivalent shares, and the Centerbridge Investors will receive warrants to purchase approximately 3.0 million shares of the Company’s common stock, each with an exercise price of $15.375 per share. The warrants are exercisable for a period of seven years and subject to mandatory exercise when the market price of the Company’s common stock reaches or exceeds $24.60 for twenty or more trading days during any thirty-consecutive trading day period. Simultaneously with entering into the definitive merger agreement, Banc of California, N.A. entered into an aggregate of $3.5 billion in interest rate swap options to hedge interest rate risk for a total cost of $15.7 million, and a contingent forward asset sale agreement on the SFR loan portfolio of $1.8 billion. Except as noted, there have been no other subsequent events that occurred during such period that would require disclosure in this report or would be required to be recognized in the consolidated financial statements as of June 30, 2023.