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Fair Value Measurements Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Estimated Fair Value $ 2,398,352 $ 2,646,767
Minimum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Assumptions used to estimate fair value, prepayment speed 7.40%  
Assumptions used to estimate fair value, discount rate 9.50%  
Fair Value, Measurements, Recurring    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Estimated Fair Value $ 2,398,352 2,646,767
Derivative assets 158,112 167,468
Fair Value, Measurements, Recurring | Level 2    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Estimated Fair Value 2,356,191 2,428,282
Derivative assets 157,540 166,796
Fair Value, Measurements, Recurring | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Estimated Fair Value 0 0
Derivative assets 0 0
Fair Value, Measurements, Recurring | Level 1    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Estimated Fair Value 42,161 218,485
Derivative assets 572 672
Fair Value, Measurements, Recurring | Foreign Exchange Contract | Level 1    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Total liabilities 500 600
Fair Value, Measurements, Recurring | Foreign Exchange Contract | Level 1    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Derivative assets 600 700
Fair Value, Measurements, Recurring | Forward Commitments | Level 2    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Derivative assets 500 200
Total liabilities 900 200
Fair Value, Measurements, Recurring | Interest Rate Swap | Level 2    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Other financial assets 157,100 166,600
Total liabilities 245,600 296,300
Corporate debt securities    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Estimated Fair Value 440,551 422,309
Corporate debt securities | Fair Value, Measurements, Recurring    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Estimated Fair Value 440,551 422,309
Corporate debt securities | Fair Value, Measurements, Recurring | Level 2    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Estimated Fair Value 440,551 422,309
Corporate debt securities | Fair Value, Measurements, Recurring | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Estimated Fair Value 0 0
Corporate debt securities | Fair Value, Measurements, Recurring | Level 1    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Estimated Fair Value 0 0
Financial Institutions Subordinated Debt | Fair Value, Measurements, Recurring | Level 2    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Estimated Fair Value 433,400 415,400
Other Corporate Debt | Fair Value, Measurements, Recurring | Level 2    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Estimated Fair Value $ 7,200 $ 6,900