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Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 1 Months Ended | 2 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Feb. 15, 2024 | Jan. 31, 2024 | Nov. 30, 2023 | Feb. 29, 2024 | Mar. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Increase in FDIC Special Assessment [Abstract] |  |  |  |  |  |  |
Pre-tax special assessment charge |  |  | $ 70,000 |  |  |  |
November 2023 Final Rule |  |  |  |  |  |  |
Increase in FDIC Special Assessment [Abstract] |  |  |  |  |  |  |
FDIC Deposit Insurance, Special Assessment, Estimated Loss |  |  | $ 16,300,000 |  |  |  |
Junior subordinated debt |  |  |  |  |  |  |
Redemption of Junior Subordinated Debt and Trust Preferred Securities Issued by East West Capital Trusts [Abstract] |  |  |  |  |  |  |
Aggregate principal amount of the junior subordinated debt |  |  |  |  |  | $ 148,000 | $ 148,000
East West Capital Trusts | Junior subordinated debt | Forecast |  |  |  |  |  |  |
Redemption of Junior Subordinated Debt and Trust Preferred Securities Issued by East West Capital Trusts [Abstract] |  |  |  |  |  |  |
Junior subordinated debenture owed to unconsolidated subsidiary trust and trust preferred securities |  |  |  | $ 16,000 | $ 101,000 |  |
Subsequent Event |  |  |  |  |  |  |
Declaration of Dividend |  |  |  |  |  |  |
Dividends paid per common share (in dollars per share) | $ 0.55 |  |  |  |  |  |
Increase in FDIC Special Assessment [Abstract] |  |  |  |  |  |  |
FDIC Deposit Insurance, Special Assessment, Increase |  |  |  | 4,100,000 |  |  |
Subsequent Event | February 2024 Update |  |  |  |  |  |  |
Increase in FDIC Special Assessment [Abstract] |  |  |  |  |  |  |
FDIC Deposit Insurance, Special Assessment, Estimated Loss |  |  |  | $ 20,400,000 |  |  |
Subsequent Event | East West Capital Trusts | Junior subordinated debt |  |  |  |  |  |  |
Redemption of Junior Subordinated Debt and Trust Preferred Securities Issued by East West Capital Trusts [Abstract] |  |  |  |  |  |  |
Aggregate principal amount of the junior subordinated debt |  | $ 113,000 |  |  |  |  |
Payments for repurchase of trust preferred securities |  | $ 4,000 |  |  |  |  |

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- Definition FDIC Deposit Insurance, Pre-Tax Special Assessment Charge + References No definition available. + Details
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- Definition Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust And Trust Preferred Securities + References No definition available. + Details
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- Definition Redemption of Junior Subordinated Debt and Trust Preferred Securities Issued by East West Capital Trusts + References No definition available. + Details
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- Definition Including the current and noncurrent portions, the carrying value of junior subordinated long-term debt owed to unconsolidated subsidiary trusts as of the balance sheet date. Such debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets and was initially scheduled to be repaid after one year or beyond the normal operating cycle if longer. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 + Details
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