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Fair Value of Financial Instruments - Carrying Value and Estimated Fair Values of Financial Instruments Not Measured at Fair Value (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Securities held to maturity $ 9,742 $ 10,456
Carrying Value | Level 1    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 334,111 470,249
Carrying Value | Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Non-marketable equity securities held in other financial institutions 75,181 71,643
Accrued interest and loan fees receivable 38,461 38,901
Deposits 8,123,036 8,223,120
FHLB advances, repurchase agreements and other borrowings 127,843 12,460
Subordinated indebtedness 89,657 159,943
Accrued interest payable 4,855 8,033
Carrying Value | Level 3    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Securities held to maturity 11,093 11,095
LHFI, net 7,592,020 7,482,653
Estimated Fair Value | Level 1    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 334,111 470,249
Estimated Fair Value | Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Non-marketable equity securities held in other financial institutions 75,181 71,643
Accrued interest and loan fees receivable 38,461 38,901
Deposits 8,117,455 8,217,564
FHLB advances, repurchase agreements and other borrowings 127,726 12,203
Subordinated indebtedness 89,640 159,928
Accrued interest payable 4,855 8,033
Estimated Fair Value | Level 3    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Securities held to maturity 9,742 10,456
LHFI, net $ 7,435,052 $ 7,209,866