XML 48 R38.htm IDEA: XBRL DOCUMENT v3.22.2
Investment Securities Schedule of Amortized Cost and Fair Values of Debt Securities by Contractual Maturities (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Amortized Cost    
Due in one year or less $ 160,087  
Due from one year to five years 280,399  
Due from five years to ten years 447,924  
Due after ten years 1,141,173  
Amortized cost, before securities without debt maturities 2,029,583  
Amortized Cost 3,034,088  
Estimated Fair Value    
Due in one year or less 160,007  
Due from one year to five years 274,819  
Due from five years to ten years 427,025  
Due after ten years 986,453  
Available for sale securities, debt maturities, before securities without single maturities 1,848,304  
Estimated Fair Value 2,778,838 $ 3,187,390
Amortized Cost    
Due in one year or less 0  
Due from one year to five years 0  
Due from five years to ten years 0  
Due after ten years 0  
Debt securities, held-to-maturity, maturity, allocated and single maturity date, amortized cost, total 0  
Amortized Cost, Held to Maturity 1,338,963 980,384
Estimated Fair Value    
Due in one year or less 0  
Due from one year to five years 0  
Due from five years to ten years 0  
Due after ten years 0  
Debt securities, held-to-maturity, maturity, Allocated and single maturity date, fair value 0  
Estimated Fair Value, Held to Maturity 1,215,325 965,867
Mortgage-Backed Securities [Member]    
Amortized Cost    
Available-for-sale securities, amortized cost without single maturity date 213,567  
Amortized Cost 213,567 231,607
Estimated Fair Value    
Available-for-sale securities, debt maturities, without single maturity date, fair value 195,359  
Estimated Fair Value 195,359 229,795
Amortized Cost    
Debt securities, held-to-maturity, maturity, without single maturity date, amortized cost 466,076  
Amortized Cost, Held to Maturity 466,076 404,958
Estimated Fair Value    
Debt securities, held-to-maturity, maturity, without single maturity date, fair value 430,929  
Estimated Fair Value, Held to Maturity 430,929 408,913
Commercial Mortgage Backed Securities [Member]    
Amortized Cost    
Available-for-sale securities, amortized cost without single maturity date 636,380  
Amortized Cost 636,380 974,541
Estimated Fair Value    
Available-for-sale securities, debt maturities, without single maturity date, fair value 587,072  
Estimated Fair Value 587,072 971,148
Amortized Cost    
Debt securities, held-to-maturity, maturity, without single maturity date, amortized cost 872,887  
Amortized Cost, Held to Maturity 872,887 575,426
Estimated Fair Value    
Debt securities, held-to-maturity, maturity, without single maturity date, fair value 784,396  
Estimated Fair Value, Held to Maturity 784,396 556,954
Collateralized Mortgage Obligations [Member]    
Amortized Cost    
Available-for-sale securities, amortized cost without single maturity date 154,558  
Amortized Cost 154,558 206,532
Estimated Fair Value    
Available-for-sale securities, debt maturities, without single maturity date, fair value 148,103  
Estimated Fair Value 148,103 $ 209,359
Amortized Cost    
Debt securities, held-to-maturity, maturity, without single maturity date, amortized cost 0  
Estimated Fair Value    
Debt securities, held-to-maturity, maturity, without single maturity date, fair value $ 0