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Derivatives and Hedging Activities (Narrative) (Details)
$ in Thousands
 6 Months Ended
Jun. 30, 2023
USD ($)
instrument
counterparty
Dec. 31, 2022
USD ($)
instrument
Derivative [Line Items]    
Amount of collateral $ 0 $ 0
Derivative assets 134,405 151,192
Derivative liability 109,882 $ 122,390
Derivative instruments in accumulated other comprehensive income (loss) reclassified to interest expense 15,700  
Notional amount $ 405,000  
Number of counterparties | counterparty 4  
Derivatives Not Designated as a Hedging Instruments | Interest rate products    
Derivative [Line Items]    
Number of derivative instruments held | instrument 152 152
Derivative notional amount $ 2,230,000 $ 2,400,000
Derivatives Not Designated as a Hedging Instruments | Credit contracts    
Derivative [Line Items]    
Number of derivative instruments held | instrument 12 14
Derivative notional amount $ 143,500 $ 157,900
Amount of collateral 70  
Derivative assets 47 26
Derivative liability $ 11 $ 12
Designated as Hedging Instrument    
Derivative [Line Items]    
Number of outstanding derivatives | instrument 9