XML 69 R54.htm IDEA: XBRL DOCUMENT v3.22.4
Investment Securities, Equity Securities with Readily Determinable Fair Values and Other Investments (Details) - USD ($)
Dec. 31, 2022
Dec. 31, 2021
Held-to-maturity securities    
Amortized cost $ 3,400,000 $ 3,400,000
Estimated fair value 3,400,000 3,400,000
Carrying Value 3,400,000 3,400,000
Available-for-sale securities    
Amortized cost 5,018,996,000 4,254,960,000
Gross unrealized gains 4,072,000 17,197,000
Gross unrealized losses (605,272,000) (58,237,000)
Estimated fair value, Available for sale securities 4,417,796,000 4,213,920,000
Total Amortized cost 5,018,996,000 4,254,960,000
Available for sale debt securities and equity securities 4,417,796,000  
Collateral Pledged    
Available-for-sale securities    
Amortized cost 1,562,832,000  
Estimated Fair Value    
Available-for-sale securities    
Available for sale debt securities and equity securities 4,417,796,000 4,213,920,000
Reported Value Measurement    
Available-for-sale securities    
Available for sale debt securities and equity securities 4,417,796,000 4,213,920,000
US Treasury Securities    
Available-for-sale securities    
Amortized cost 49,752,000  
Gross unrealized losses (359,000)  
US Treasury Securities | Estimated Fair Value    
Available-for-sale securities    
Estimated fair value, Available for sale securities 49,393,000  
US Treasury Securities | Reported Value Measurement    
Available-for-sale securities    
Estimated fair value, Available for sale securities 49,393,000  
Residential mortgage-backed securities    
Available-for-sale securities    
Amortized cost 4,805,735,000 4,213,441,000
Gross unrealized gains 3,145,000 14,159,000
Gross unrealized losses (599,668,000) (58,237,000)
Residential mortgage-backed securities | Estimated Fair Value    
Available-for-sale securities    
Estimated fair value, Available for sale securities 4,209,212,000 4,169,363,000
Residential mortgage-backed securities | Reported Value Measurement    
Available-for-sale securities    
Estimated fair value, Available for sale securities 4,209,212,000 4,169,363,000
US Government Corporations and Agencies Securities [Member]    
Available-for-sale securities    
Estimated fair value, Available for sale securities 681,121,000 824,474
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]    
Available-for-sale securities    
Estimated fair value, Available for sale securities 3,528,091,000 3,344,889
States and political subdivisions    
Available-for-sale securities    
Amortized cost 163,509,000 41,519,000
Gross unrealized gains 927,000 3,038,000
Gross unrealized losses (5,245,000)  
States and political subdivisions | Estimated Fair Value    
Available-for-sale securities    
Estimated fair value, Available for sale securities 159,191,000 44,557,000
States and political subdivisions | Reported Value Measurement    
Available-for-sale securities    
Estimated fair value, Available for sale securities 159,191,000 44,557,000
Other Debt Obligations    
Held-to-maturity securities    
Amortized cost 3,400,000 3,400,000
Estimated fair value 3,400,000 3,400,000
Carrying Value $ 3,400,000 $ 3,400,000