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Subsequent Events (Details) - Subsequent Event - HomeStreet
$ / shares in Units, $ in Millions
Jan. 16, 2024
USD ($)
branch
$ / shares
shares
Subsequent Event [Line Items]  
Shares issuable in merger (in shares) 0.4345
Business combination, expected total assets after merger | $ $ 17,000.0
Business combination, expected branches after merger | branch 129
Minimum  
Subsequent Event [Line Items]  
Number of authorized common shares upon consummation of Merger (in shares) 60,000,000
Maximum  
Subsequent Event [Line Items]  
Number of authorized common shares upon consummation of Merger (in shares) 110,000,000
Common stock  
Subsequent Event [Line Items]  
Sale of stock, number of shares issued (in shares) 2,461,538
Consideration received from issuance of common stock | $ $ 80.0
Business combination, common stock expected to issue concurrent with and subject to closing | $ $ 95.0
Sale of stock, price per share (in dollars per share) | $ / shares $ 32.50
Sale of stock, number of shares exchange for sale and issuance of purchase price (in shares) 2,920,000
Number of authorized common shares upon consummation of Merger (in shares) 100,000,000
Preferred Stock  
Subsequent Event [Line Items]  
Number of authorized common shares upon consummation of Merger (in shares) 10,000,000
Merger Warrants  
Subsequent Event [Line Items]  
Warrants, term 3 years
Merger Warrants | Common stock  
Subsequent Event [Line Items]  
Number of shares called by warrants (in shares) 1,150,000
Exercise price of warrants (in dollars per share) | $ / shares $ 32.50