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Pacific Western Business Combination (Details) - USD ($) $ in Thousands | Nov. 30, 2023 | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | --- | ---
Asset Acquisition [Line Items] |  |  |  |
Cash and due from banks |  |  | $ 203,467 | $ 202,427
Loans held for sale |  |  | 1,935,455 | 122,757
Loans and leases, net | [1] |  | 22,981,147 | 25,208,000
Premises and equipment, net |  |  | 145,734 | 146,798
Other assets |  |  | 1,028,474 | 1,131,249
Assets |  |  | 35,243,839 | 38,534,064
Deposits |  |  | $ 28,804,450 | $ 30,401,769
Long-term debt - Asset Acquistion |  | $ 257,600 |  |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net |  | 447,079 |  |
Goodwill, Transfers |  | 215,925 |  |
Pacific Western Bank |  |  |  |
Asset Acquisition [Line Items] |  |  |  |
Business Combination, Consideration Transferred |  | 663,004 |  |
Cash and due from banks |  | 335,300 |  |
Debt Securities AFS - Asset Acquistion |  | 872,800 |  |
Loans held for sale |  | 2,179,860 |  |
Loans and leases, net |  | 3,953,888 |  |
Premises and equipment, net |  | 103,500 |  |
Other Intangible Assets, Net |  | 145,500 |  |
Current and Deferred Tax Assets, net |  | 208,771 |  |
Other assets |  | 391,050 |  |
Assets |  | 8,190,669 |  |
Deposits |  | 6,547,659 |  |
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances |  | 794,000 |  |
Other Liabilities |  | 144,331 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities |  | $ 7,743,590 |  |
[1] | Excludes accrued interest receivable of $109.2 million and $111.3 million at June 30, 2024 and December 31, 2023, respectively, which is recorded in "Other assets" on the condensed consolidated balance sheets.

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