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Acquisitions - Additional Information (Details)
$ in Thousands
Sep. 17, 2021
USD ($)
business
county
Jun. 30, 2022
USD ($)
Dec. 31, 2021
USD ($)
Asset Acquisition [Line Items]      
Acquisition of goodwill   $ 154,572 $ 154,572
TCF National Bank      
Asset Acquisition [Line Items]      
Number of businesses acquired | business 14    
Number of businesses acquired in country | county 11    
Cash acquired $ 618,167    
Loans 212,000    
Fixed assets 6,901    
Cash and due from banks $ 4,012    
Premium percentage on deposits 1.75%    
Customer deposits $ 846,400    
Acquisition of goodwill 3,334    
TCF National Bank | Core Deposit Intangible      
Asset Acquisition [Line Items]      
Core deposit intangible $ 1,600    
Core deposit intangible amortization period 10 years