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Fair Value Measurements Assets and Liabilities Measured and Recorded (Details) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Equity Securities, FV-NI $ 3 $ 1    
(amortized cost of $2,526,644 and $2,699,255, respectively) 2,246,839 2,346,864    
Other Borrowings, Fair Value Disclosure 118,838 123,116    
Cash Flow Hedging        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Cash Flow Hedge Derivative Instrument Assets at Fair Value 1,400      
Credit-Link Notes        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Other Borrowings, Fair Value Disclosure 118,838 123,116 $ 132,030 $ 0
Fair Value, Recurring        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Cash Flow Hedge Derivative Instrument Assets at Fair Value 1,442      
Warrants Not Settleable in Cash, Fair Value Disclosure 3,763 3,689    
Cash Flow Hedge Derivative Instrument Liabilities at Fair Value   4,090    
Derivative Liability, Fair Value of Collateral 7,562 6,459    
(amortized cost of $2,526,644 and $2,699,255, respectively) 2,246,839      
Fair Value, Recurring | Government agency and government-sponsored enterprise pass through securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 861,840 1,187,609    
Fair Value, Recurring | Commercial Mortgage Backed Securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 51,564 253,306    
Fair Value, Recurring | Government agency and government-sponsored enterprise collateralized mortgage obligations [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 446,631 284,334    
Fair Value, Recurring | Municipal Securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 594 28,083    
Fair Value, Recurring | US Treasury Securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively)   4,968    
Fair Value, Recurring | Corporate Debt Securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 257,712 267,232    
Fair Value, Recurring | Private Label Collateralized Mortgage Obligations [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 316,910 158,412    
Fair Value, Recurring | Collateralized Loan Obligations [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 279,416 108,416    
Fair Value, Recurring | Mortgage-backed Securities, Issued by Private Enterprises        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 12,372 20,813    
Fair Value, Recurring | Asset-backed Securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 15,600 19,952    
Fair Value, Recurring | SBA asset-backed securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 4,200 13,739    
Level 1 | Fair Value, Recurring        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Cash Flow Hedge Derivative Instrument Assets at Fair Value 0      
Warrants Not Settleable in Cash, Fair Value Disclosure 0 0    
Cash Flow Hedge Derivative Instrument Liabilities at Fair Value   0    
Derivative Liability, Fair Value of Collateral 0 0    
Equity Securities, FV-NI 3 1    
(amortized cost of $2,526,644 and $2,699,255, respectively) 0 4,968    
Other Borrowings 0 0    
Level 1 | Fair Value, Recurring | Government agency and government-sponsored enterprise pass through securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 0 0    
Level 1 | Fair Value, Recurring | Commercial Mortgage Backed Securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 0 0    
Level 1 | Fair Value, Recurring | Government agency and government-sponsored enterprise collateralized mortgage obligations [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 0 0    
Level 1 | Fair Value, Recurring | Municipal Securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 0 0    
Level 1 | Fair Value, Recurring | US Treasury Securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively)   4,968    
Level 1 | Fair Value, Recurring | Corporate Debt Securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 0 0    
Level 1 | Fair Value, Recurring | Private Label Collateralized Mortgage Obligations [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 0 0    
Level 1 | Fair Value, Recurring | Collateralized Loan Obligations [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 0 0    
Level 1 | Fair Value, Recurring | Mortgage-backed Securities, Issued by Private Enterprises        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 0 0    
Level 1 | Fair Value, Recurring | Asset-backed Securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 0 0    
Level 1 | Fair Value, Recurring | SBA asset-backed securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 0 0    
Level 2 | Fair Value, Recurring        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Cash Flow Hedge Derivative Instrument Assets at Fair Value 1,442      
Warrants Not Settleable in Cash, Fair Value Disclosure 0 0    
Cash Flow Hedge Derivative Instrument Liabilities at Fair Value   4,090    
Derivative Liability, Fair Value of Collateral 7,562 6,459    
Equity Securities, FV-NI 0 0    
(amortized cost of $2,526,644 and $2,699,255, respectively) 2,244,709 2,301,647    
Other Borrowings 0 0    
Level 2 | Fair Value, Recurring | Government agency and government-sponsored enterprise pass through securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 861,840 1,187,609    
Level 2 | Fair Value, Recurring | Commercial Mortgage Backed Securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 51,564 253,306    
Level 2 | Fair Value, Recurring | Government agency and government-sponsored enterprise collateralized mortgage obligations [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 446,631 284,334    
Level 2 | Fair Value, Recurring | Municipal Securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 594 28,083    
Level 2 | Fair Value, Recurring | US Treasury Securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively)   0    
Level 2 | Fair Value, Recurring | Corporate Debt Securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 255,582 226,983    
Level 2 | Fair Value, Recurring | Private Label Collateralized Mortgage Obligations [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 316,910 158,412    
Level 2 | Fair Value, Recurring | Collateralized Loan Obligations [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 279,416 108,416    
Level 2 | Fair Value, Recurring | Mortgage-backed Securities, Issued by Private Enterprises        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 12,372 20,813    
Level 2 | Fair Value, Recurring | Asset-backed Securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 15,600 19,952    
Level 2 | Fair Value, Recurring | SBA asset-backed securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 4,200 13,739    
Level 3        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Warrants Not Settleable in Cash, Fair Value Disclosure 3,763 3,689 $ 4,048 $ 3,555
Level 3 | Fair Value, Recurring        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Cash Flow Hedge Derivative Instrument Assets at Fair Value 0      
Warrants Not Settleable in Cash, Fair Value Disclosure 3,763 3,689    
Cash Flow Hedge Derivative Instrument Liabilities at Fair Value   0    
Derivative Liability, Fair Value of Collateral 0 0    
Equity Securities, FV-NI 0 0    
(amortized cost of $2,526,644 and $2,699,255, respectively) 2,130 40,249    
Other Borrowings 118,838 123,116    
Level 3 | Fair Value, Recurring | Government agency and government-sponsored enterprise pass through securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 0 0    
Level 3 | Fair Value, Recurring | Commercial Mortgage Backed Securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 0 0    
Level 3 | Fair Value, Recurring | Government agency and government-sponsored enterprise collateralized mortgage obligations [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 0 0    
Level 3 | Fair Value, Recurring | Municipal Securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 0 0    
Level 3 | Fair Value, Recurring | US Treasury Securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively)   0    
Level 3 | Fair Value, Recurring | Corporate Debt Securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 2,130 40,249    
Level 3 | Fair Value, Recurring | Private Label Collateralized Mortgage Obligations [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 0 0    
Level 3 | Fair Value, Recurring | Collateralized Loan Obligations [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 0 0    
Level 3 | Fair Value, Recurring | Mortgage-backed Securities, Issued by Private Enterprises        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 0 0    
Level 3 | Fair Value, Recurring | Asset-backed Securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) 0 0    
Level 3 | Fair Value, Recurring | SBA asset-backed securities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
(amortized cost of $2,526,644 and $2,699,255, respectively) $ 0 $ 0