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Investment Securities (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2022
Mar. 31, 2022
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Investment Securities Information [Line Items]                
Transfer of AFS securities to HTM securities   $ 1,600,000,000       $ 1,621,990,000 $ 0  
Proceeds from sales of investment securities $ 248,000   $ 0 $ 107,000,000 $ 51,000,000 1,309,000 158,708,000  
Debt Instrument, Collateral Amount 2,400,000,000         2,400,000,000   $ 2,300,000,000
Interest receivable 115,782,000         115,782,000   80,528,000
Debt Securities, Held-to-maturity, Nonaccrual, Interest Income           0 $ 0  
Debt Securities, Held to Maturity, Past Due 0         0   0
Held to maturity allowance for credit loss (61,000)         (61,000)   (55,000)
Federal Home Loan Bank Stock 193,000,000         193,000,000   82,000,000
Federal Reserve Bank Stock 87,000,000         87,000,000   87,000,000
Equity securities with readily determinable fair values, Fair Value 6,000,000         6,000,000   5,000,000
Equity Securities without Readily Determinable Fair Value, Amount 19,000,000         19,000,000   14,000,000
Held-to-maturity Securities [Member]                
Investment Securities Information [Line Items]                
Interest receivable 16,000,000         16,000,000   15,000,000
Available-for-sale Securities [Member]                
Investment Securities Information [Line Items]                
Interest receivable 8,000,000         8,000,000   9,000,000
Federal Home Loan Bank Certificates and Obligations (FHLB) [Member]                
Investment Securities Information [Line Items]                
Interest receivable 2,000,000         2,000,000   975,000
Federal Reserve Bank Stock [Member]                
Investment Securities Information [Line Items]                
Interest receivable 819,000         819,000   0
US Treasury Securities                
Investment Securities Information [Line Items]                
Held to maturity allowance for credit loss 0         0   0
US States and Political Subdivisions Debt Securities [Member]                
Investment Securities Information [Line Items]                
Held to maturity allowance for credit loss 0         0   0
Agency mortgage-related securities                
Investment Securities Information [Line Items]                
Held to maturity allowance for credit loss $ 0         $ 0   $ 0