SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	9 Months Ended
Sep. 30, 2023
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation: The accompanying unaudited interim consolidated financial statements have been prepared pursuant to Article 10 of SEC Regulation S-X and other SEC rules and regulations for reporting on the Quarterly Report on Form 10-Q. Accordingly, certain disclosures required by U.S. generally accepted accounting principles (“GAAP”) are not included herein. These interim statements should be read in conjunction with the consolidated financial statements and notes included in the Annual Report on Form 10-K for the year ended December 31, 2022 filed by us with the SEC.
Reclassification	Certain prior period amounts have been reclassified to conform to current period presentation. These reclassifications are immaterial and have no effect on net income, comprehensive income (loss), total assets or total shareholders’ equity previously reported.In the opinion of management of the Company, the accompanying unaudited interim consolidated financial statements reflect all of the adjustments (consisting of normal recurring adjustments) necessary for a fair presentation of the consolidated financial condition and consolidated results of operations as of the dates and for the periods presented.
Principles of Consolidation	Principles of Consolidation: The accompanying unaudited consolidated financial statements include the accounts of the Company and its consolidated subsidiaries as of September 30, 2023 and December 31, 2022 and for the three and nine months ended September 30, 2023 and September 30, 2022. Significant intercompany accounts and transactions have been eliminated in consolidation. Unless the context requires otherwise, all references to the Company include its then wholly-owned subsidiaries.
Significant Accounting Policies, and Recent Accounting Guidance	Significant Accounting Policies: The accounting and reporting policies of the Company are based upon GAAP and conform to predominant practices within the banking industry. We have not made any changes in our significant accounting policies from those disclosed in our Annual Report on Form 10-K for the year ended December 31, 2022 filed with the SEC, except for those described below, which reflect an update to our accounting policy on derivative instruments and the impact of the adoption of ASU 2022-02: Recently Adopted Accounting Guidance: In March 2022, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2022-02, Financial Instruments—Credit Losses (Topic 326) Troubled Debt Restructurings and Vintage Disclosures, which addresses areas identified by the FASB as part of its post-implementation review of the credit losses standard (“ASU 2016-13”) that introduced the current expected credit losses (“CECL”) model. The amendments eliminate the accounting guidance for TDRs by creditors that have adopted the CECL model and enhances the disclosure requirements for loan refinancings and restructurings made with borrowers experiencing financial difficulty. In addition, the amendments require a public business entity to disclose current-period gross write-offs for financing receivables by year of origination in the vintage disclosures. ASU 2022-02 is effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. We adopted ASU 2022-02 on January 1, 2023 and the impact of adoption did not have a material effect on our consolidated financial statements. Recently Issued Accounting Guidance Not Yet Adopted: In March 2023, the FASB issued ASU 2023-02, Investments - Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method (a consensus of the Emerging Issues Task Force)(“ASU 2023-02”), which permits reporting entities to elect to account for their tax equity investments, regardless of the tax credit program from which the income tax credits are received, using the proportional amortization method, which was previously allowed only for low-income housing tax credit (“LIHTC”) investments, if certain conditions are met. ASU 2023-02 is effective for fiscal years beginning after December 15, 2023, and including interim periods within those fiscal years. The amendment must be applied on either a modified retrospective or a retrospective basis, and early adoption is permitted. The Company is currently evaluating the impact of this update on its consolidated financial statements and related disclosures, including assessing eligibility to apply the updated guidance to our investments in alternative energy partnerships currently accounted for using the HLBV method of the equity method of accounting.
Derivative Instruments	Derivative Instruments: We record our derivative instruments at fair value as either assets or liabilities on the consolidated statements of financial condition in derivative assets and accrued expenses and other liabilities, respectively, and have elected to present all derivatives with counterparties on a gross basis. For fair value derivatives that qualify for hedge accounting, we record changes in the fair value in noninterest income. For derivatives that do not qualify for hedge accounting, the fair value impact is recorded in noninterest income in the income statement. For derivatives designated as cash flow hedges, the gain or loss on the derivatives is recorded in other comprehensive income and subsequently reclassified into earnings in the same period during which the hedged transaction affects earnings. Derivative instruments utilized by the Company included the following: Interest Rate Swaps and Caps. We offer interest rate swap and cap products to certain loan clients to allow them to hedge the risk of rising interest rates on their variable rate loans. When such products are issued, we also enter into an offsetting swap with institutional counterparties to eliminate the interest rate risk. These back-to-back derivative agreements, which generate fee income for us, are intended to offset each other. We retain the credit risk of the original loan. The net cash flow for us is equal to the interest income received from a variable rate loan originated with the client plus a fee. These swaps and caps are not designated as accounting hedges and are recorded at fair value in derivative assets and accrued expenses and other liabilities in the consolidated statements of financial condition. The changes in fair value are recorded in noninterest income in the consolidated statements of operations. Foreign Exchange Contracts. We offer short-term foreign exchange contracts to our clients to purchase and/or sell foreign currencies at set rates in the future. These products allow clients to hedge the foreign exchange rate risk of their deposits and loans denominated in foreign currencies. In conjunction with these products, we also enter into offsetting contracts with institutional counterparties to hedge our foreign exchange rate risk. These back-to-back contracts allow us to offer our clients foreign exchange products while minimizing our exposure to foreign exchange rate fluctuations. These foreign exchange contracts are not designated as accounting hedges and are recorded at fair value in derivative assets and accrued expenses and other liabilities on the consolidated statements of financial condition. Interest Rate Swaptions and Contingent Forward Loan Sale Agreement. Concurrently with the announcement of the proposed merger with PacWest, we entered into an aggregate of $3.1 billion in interest rate swaptions to hedge the interest rate risk associated with various assets on our balance sheet in anticipation of the sale of such assets in connection with the proposed merger with PacWest and a contingent forward loan sale agreement on $1.8 billion of the SFR loan portfolio. The contingent forward loan sale agreement is contingent upon receipt of approval to close the bank merger. Should the merger not close for any reason, we intend to continue to hold the SFR loan portfolio for investment. These derivative instruments are not designated as accounting hedges and are recorded at fair value in derivative assets on the consolidated statements of financial condition. The fair values of these derivative instruments will rise and fall in response to changes in market interest rates and the change in fair value is recorded in noninterest income in the consolidated statements of operations. Cash Flow Hedge. The Company applies hedge accounting for qualifying derivative instruments used to manage interest rate risk. A cash flow hedge is a derivative instrument used to manage the variability in future expected cash flows that would otherwise be impacted by movements in interest rates. To quality for hedge accounting, the cash flow hedge must be highly effective at reducing the risk associated with the hedged exposure. The effectiveness of the hedging relationship is documented at inception and is monitored at least quarterly through the life of the transaction. A cash flow hedge that is designated as highly effective is carried at fair value with the change in fair value recorded in other comprehensive income (loss) (“AOCI”) and subsequently recognized in earnings in the same period that the hedged forecasted transaction affects earnings. At that time, the amount reclassified from AOCI is presented in the same income statement line item in which the hedged transaction is reported (interest income or expense). If the cash flow hedge becomes ineffective, the change in fair value is reclassified from AOCI to earnings. Cash flows from cash flow hedges are classified as operating activities in the statement of cash flows. We classify both the earnings and cash flow impact from these derivatives consistent with the underlying hedged item. Loan Modifications to Borrowers Experiencing Financial Difficulty: Prior to the adoption of ASU 2022-02, we accounted for the modification to the contractual terms of a loan that resulted in granting a concession to a borrower experiencing financial difficulties as a troubled debt restructuring (“TDR”). Effective January 1, 2023, we adopted ASU 2022-02, which eliminated TDR accounting prospectively for all restructurings occurring on or after January 1, 2023. Loans that were considered a TDR prior to the adoption of ASU 2022-02 will continue to be accounted for under the superseded TDR accounting guidance until the loan is paid off, liquidated, or subsequently modified. Since adoption of ASU 2022-02 on January 1, 2023, we have evaluated all loan modifications under ASC 310-20 to determine whether a modification made to a borrower results in a new loan or is a continuation of the existing loan.
Use of Estimates in the Preparation of Financial Statements	Use of Estimates in the Preparation of Financial Statements: The preparation of financial statements, in conformity with GAAP, requires management to make estimates and assumptions based on available information. These estimates and assumptions affect the amounts reported in the consolidated financial statements and disclosures provided, and actual results could differ. The allowance for credit losses (“ACL”) (which includes the allowance for loan losses (“ALL”) and the reserve for unfunded noncancellable loan commitments (“RUC”)), loan repurchase reserve, realization of deferred tax assets, the fair value of assets and liabilities acquired in business combinations and related purchase price allocation, the valuation of goodwill and other intangible assets, other derivatives, hypothetical liquidation at book value (“HLBV”) of investments in alternative energy partnerships, and the fair value measurement of financial instruments are particularly subject to change and such change could have a material effect on the consolidated financial statements.
Sale-leaseback Transaction	Sale-leaseback Transactions In January 2022, we completed a sale-leaseback transaction for $2.4 million and recognized a gain of $0.8 million. Gains related to sale-leaseback are included in other income in the accompanying consolidated statements of operations.

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)

9 Months Ended

Sep. 30, 2023

Basis of Presentation: The accompanying unaudited interim consolidated financial statements have been prepared pursuant to Article 10 of SEC Regulation S-X and other SEC rules and regulations for reporting on the Quarterly Report on Form 10-Q. Accordingly, certain disclosures required by U.S. generally accepted accounting principles (“GAAP”) are not included herein. These interim statements should be read in conjunction with the consolidated financial statements and notes included in the Annual Report on Form 10-K for the year ended December 31, 2022 filed by us with the SEC.

Reclassification

Certain prior period amounts have been reclassified to conform to current period presentation. These reclassifications are immaterial and have no effect on net income, comprehensive income (loss), total assets or total shareholders’ equity previously reported.In the opinion of management of the Company, the accompanying unaudited interim consolidated financial statements reflect all of the adjustments (consisting of normal recurring adjustments) necessary for a fair presentation of the consolidated financial condition and consolidated results of operations as of the dates and for the periods presented.

Principles of Consolidation

Principles of Consolidation: The accompanying unaudited consolidated financial statements include the accounts of the Company and its consolidated subsidiaries as of September 30, 2023 and December 31, 2022 and for the three and nine months ended September 30, 2023 and September 30, 2022. Significant intercompany accounts and transactions have been eliminated in consolidation. Unless the context requires otherwise, all references to the Company include its then wholly-owned subsidiaries.

Significant Accounting Policies, and Recent Accounting Guidance

Significant Accounting Policies: The accounting and reporting policies of the Company are based upon GAAP and conform to predominant practices within the banking industry. We have not made any changes in our significant accounting policies from those disclosed in our Annual Report on Form 10-K for the year ended December 31, 2022 filed with the SEC, except for those described below, which reflect an update to our accounting policy on derivative instruments and the impact of the adoption of ASU 2022-02:

Recently Adopted Accounting Guidance: In March 2022, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2022-02, Financial Instruments—Credit Losses (Topic 326) Troubled Debt Restructurings and Vintage Disclosures, which addresses areas identified by the FASB as part of its post-implementation review of the credit losses standard (“ASU 2016-13”) that introduced the current expected credit losses (“CECL”) model. The amendments eliminate the accounting guidance for TDRs by creditors that have adopted the CECL model and enhances the disclosure requirements for loan refinancings and restructurings made with borrowers experiencing financial difficulty. In addition, the amendments require a public business entity to disclose current-period gross write-offs for financing receivables by year of origination in the vintage disclosures. ASU 2022-02 is effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. We adopted ASU 2022-02 on January 1, 2023 and the impact of adoption did not have a material effect on our consolidated financial statements.

Recently Issued Accounting Guidance Not Yet Adopted: In March 2023, the FASB issued ASU 2023-02, Investments - Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method (a consensus of the Emerging Issues Task Force)(“ASU 2023-02”), which permits reporting entities to

elect to account for their tax equity investments, regardless of the tax credit program from which the income tax credits are received, using the proportional amortization method, which was previously allowed only for low-income housing tax credit (“LIHTC”) investments, if certain conditions are met. ASU 2023-02 is effective for fiscal years beginning after December 15, 2023, and including interim periods within those fiscal years. The amendment must be applied on either a modified retrospective or a retrospective basis, and early adoption is permitted. The Company is currently evaluating the impact of this update on its consolidated financial statements and related disclosures, including assessing eligibility to apply the updated guidance to our investments in alternative energy partnerships currently accounted for using the HLBV method of the equity method of accounting.

Derivative Instruments

Derivative Instruments: We record our derivative instruments at fair value as either assets or liabilities on the consolidated statements of financial condition in derivative assets and accrued expenses and other liabilities, respectively, and have elected to present all derivatives with counterparties on a gross basis. For fair value derivatives that qualify for hedge accounting, we record changes in the fair value in noninterest income. For derivatives that do not qualify for hedge accounting, the fair value impact is recorded in noninterest income in the income statement. For derivatives designated as cash flow hedges, the gain or loss on the derivatives is recorded in other comprehensive income and subsequently reclassified into earnings in the same period during which the hedged transaction affects earnings. Derivative instruments utilized by the Company included the following:

Interest Rate Swaps and Caps. We offer interest rate swap and cap products to certain loan clients to allow them to hedge the risk of rising interest rates on their variable rate loans. When such products are issued, we also enter into an offsetting swap with institutional counterparties to eliminate the interest rate risk. These back-to-back derivative agreements, which generate fee income for us, are intended to offset each other. We retain the credit risk of the original loan. The net cash flow for us is equal to the interest income received from a variable rate loan originated with the client plus a fee. These swaps and caps are not designated as accounting hedges and are recorded at fair value in derivative assets and accrued expenses and other liabilities in the consolidated statements of financial condition. The changes in fair value are recorded in noninterest income in the consolidated statements of operations.

Foreign Exchange Contracts. We offer short-term foreign exchange contracts to our clients to purchase and/or sell foreign currencies at set rates in the future. These products allow clients to hedge the foreign exchange rate risk of their deposits and loans denominated in foreign currencies. In conjunction with these products, we also enter into offsetting contracts with

institutional counterparties to hedge our foreign exchange rate risk. These back-to-back contracts allow us to offer our clients foreign exchange products while minimizing our exposure to foreign exchange rate fluctuations. These foreign exchange contracts are not designated as accounting hedges and are recorded at fair value in derivative assets and accrued expenses and other liabilities on the consolidated statements of financial condition.

Interest Rate Swaptions and Contingent Forward Loan Sale Agreement. Concurrently with the announcement of the proposed merger with PacWest, we entered into an aggregate of $3.1 billion in interest rate swaptions to hedge the interest rate risk associated with various assets on our balance sheet in anticipation of the sale of such assets in connection with the proposed merger with PacWest and a contingent forward loan sale agreement on $1.8 billion of the SFR loan portfolio. The contingent forward loan sale agreement is contingent upon receipt of approval to close the bank merger. Should the merger not close for any reason, we intend to continue to hold the SFR loan portfolio for investment. These derivative instruments are not designated as accounting hedges and are recorded at fair value in derivative assets on the consolidated statements of financial condition. The fair values of these derivative instruments will rise and fall in response to changes in market interest rates and the change in fair value is recorded in noninterest income in the consolidated statements of operations.

Cash Flow Hedge. The Company applies hedge accounting for qualifying derivative instruments used to manage interest rate risk. A cash flow hedge is a derivative instrument used to manage the variability in future expected cash flows that would otherwise be impacted by movements in interest rates. To quality for hedge accounting, the cash flow hedge must be highly effective at reducing the risk associated with the hedged exposure. The effectiveness of the hedging relationship is documented at inception and is monitored at least quarterly through the life of the transaction.

A cash flow hedge that is designated as highly effective is carried at fair value with the change in fair value recorded in other comprehensive income (loss) (“AOCI”) and subsequently recognized in earnings in the same period that the hedged forecasted transaction affects earnings. At that time, the amount reclassified from AOCI is presented in the same income statement line item in which the hedged transaction is reported (interest income or expense). If the cash flow hedge becomes ineffective, the change in fair value is reclassified from AOCI to earnings.

Cash flows from cash flow hedges are classified as operating activities in the statement of cash flows. We classify both the earnings and cash flow impact from these derivatives consistent with the underlying hedged item.

Loan Modifications to Borrowers Experiencing Financial Difficulty: Prior to the adoption of ASU 2022-02, we accounted for the modification to the contractual terms of a loan that resulted in granting a concession to a borrower experiencing financial difficulties as a troubled debt restructuring (“TDR”). Effective January 1, 2023, we adopted ASU 2022-02, which eliminated TDR accounting prospectively for all restructurings occurring on or after January 1, 2023. Loans that were considered a TDR prior to the adoption of ASU 2022-02 will continue to be accounted for under the superseded TDR accounting guidance until the loan is paid off, liquidated, or subsequently modified. Since adoption of ASU 2022-02 on January 1, 2023, we have evaluated all loan modifications under ASC 310-20 to determine whether a modification made to a borrower results in a new loan or is a continuation of the existing loan.

Use of Estimates in the Preparation of Financial Statements

Use of Estimates in the Preparation of Financial Statements: The preparation of financial statements, in conformity with GAAP, requires management to make estimates and assumptions based on available information. These estimates and assumptions affect the amounts reported in the consolidated financial statements and disclosures provided, and actual results could differ. The allowance for credit losses (“ACL”) (which includes the allowance for loan losses (“ALL”) and the reserve for unfunded noncancellable loan commitments (“RUC”)), loan repurchase reserve, realization of deferred tax assets, the fair value of assets and liabilities acquired in business combinations and related purchase price allocation, the valuation of goodwill and other intangible assets, other derivatives, hypothetical liquidation at book value (“HLBV”) of investments in alternative energy partnerships, and the fair value measurement of financial instruments are particularly subject to change and such change could have a material effect on the consolidated financial statements.

Sale-leaseback Transaction

Sale-leaseback Transactions

In January 2022, we completed a sale-leaseback transaction for $2.4 million and recognized a gain of $0.8 million. Gains related to sale-leaseback are included in other income in the accompanying consolidated statements of operations.