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Investment Securities - Amortized Cost and Fair Value (Details) - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Scheduled of amortized cost and fair value of securities pledged as collateral    
Fair Value $ 2,030,826 $ 2,097,839
Asset Pledged as Collateral    
Scheduled of amortized cost and fair value of securities pledged as collateral    
Amortized Cost 1,213,371 336,039
Fair Value 1,069,251 291,631
State and local governments public deposits | Asset Pledged as Collateral    
Scheduled of amortized cost and fair value of securities pledged as collateral    
Amortized Cost 225,512 156,784
Fair Value 210,173 137,931
FRB | Asset Pledged as Collateral    
Scheduled of amortized cost and fair value of securities pledged as collateral    
Amortized Cost 881,662 60,660
Fair Value 765,440 49,506
Securities sold under agreement to repurchase | Asset Pledged as Collateral    
Scheduled of amortized cost and fair value of securities pledged as collateral    
Amortized Cost 52,084 63,685
Fair Value 46,614 55,836
Other securities pledged | Asset Pledged as Collateral    
Scheduled of amortized cost and fair value of securities pledged as collateral    
Amortized Cost 54,113 54,910
Fair Value $ 47,024 $ 48,358