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Investment Securities - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]      
Federal Home Loan Bank stock, at cost $ 34,290 $ 17,250  
Transfer of securities available-for-sale to held-to-maturity 2,260,407 $ 0 $ 0
OCI, Debt Securities, Available-for-Sale, Transfer from Held-to-Maturity, Gain (Loss), before Adjustment and Tax 218,300    
Available-for-sale Securities      
Investments, Debt and Equity Securities [Abstract]      
Available For Sale Securities Pledged As Collateral Amortized Cost 1,200,000    
Net Investment Income [Line Items]      
Available For Sale Securities Pledged As Collateral Amortized Cost 1,200,000    
Held-to-maturity Securities      
Investments, Debt and Equity Securities [Abstract]      
Available For Sale Securities Pledged As Collateral Amortized Cost 1,700,000    
Net Investment Income [Line Items]      
Available For Sale Securities Pledged As Collateral Amortized Cost $ 1,700,000