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Securities Securities (Available for sale securities in continuous unrealized loss position) (Details)
$ in Thousands
Sep. 30, 2022
USD ($)
holding
Dec. 31, 2021
USD ($)
holding
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]    
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | holding 190 37
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months $ 506,666 $ 1,210,544
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (60,085) (21,197)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 915,232 1,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (120,372) (199)
Debt Securities, Available-for-sale, Unrealized Loss Position 1,421,898 1,211,544
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss $ 180,457 $ 21,396
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]    
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]    
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | holding 142 12
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months $ 263,358 $ 214,678
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (29,512) (5,534)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 79,167 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (19,681) 0
Debt Securities, Available-for-sale, Unrealized Loss Position 342,525 214,678
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss $ 49,193 $ 5,534
Collateralized Debt Obligations [Member]    
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]    
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | holding 11 1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months $ 39,291 $ 22,960
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (2,890) (571)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 0 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 0 0
Debt Securities, Available-for-sale, Unrealized Loss Position 39,291 22,960
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss $ 2,890 $ 571
US States and Political Subdivisions Debt Securities [Member]    
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]    
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | holding 1  
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months $ 187  
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (6)  
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 0  
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 0  
Debt Securities, Available-for-sale, Unrealized Loss Position 187  
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss $ 6  
Pooled trust preferred securities issued by banks and insurers    
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]    
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | holding 1 1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months $ 0 $ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 0 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 999 1,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (203) (199)
Debt Securities, Available-for-sale, Unrealized Loss Position 999 1,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss $ 203 $ 199
Small Business Administration Pooled Securities [Member]    
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]    
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | holding 8  
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months $ 36,885  
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (3,768)  
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 17,611  
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (3,784)  
Debt Securities, Available-for-sale, Unrealized Loss Position 54,496  
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss $ 7,552  
U.S. government agency securities    
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]    
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | holding 9 6
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months $ 80,353 $ 160,913
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (11,483) (2,901)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 119,589 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (19,697) 0
Debt Securities, Available-for-sale, Unrealized Loss Position 199,942 160,913
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss $ 31,180 $ 2,901
US Treasury Securities [Member]    
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]    
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | holding 18 17
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months $ 86,592 $ 811,993
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (12,426) (12,191)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 697,866 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (77,007) 0
Debt Securities, Available-for-sale, Unrealized Loss Position 784,458 811,993
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss $ 89,433 $ 12,191