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INVESTMENT SECURITIES - Pledged to Secure Borrowings and Public Deposits (Details) - Asset Pledged as Collateral without Right - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Total securities pledged as collateral | $ 656,787 | $ 214,817
Deposits |  |
Debt Securities, Available-for-sale [Line Items] |  |
Federal Reserve Bank to secure borrowings | 644,636 | 0
Washington, Oregon and California to secure public deposits | 10,655 | 212,806
Notes Payable, Other Payables |  |
Debt Securities, Available-for-sale [Line Items] |  |
Other securities pledged | $ 1,496 | $ 2,011

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- Definition Pledged Assets Not Separately Reported Securities Pledged For State and Local Governments. + References No definition available. + Details
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