XML 88 R73.htm IDEA: XBRL DOCUMENT v3.20.4
Investment Securities - Amortized Cost and Estimated Fair Value of Debt Securities Available for Sale (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Investment Securities [Line Items]    
Due within 1 year, Amortized Cost $ 104,995  
Due after 1 but within 5 years, Amortized Cost 19,349  
Due after 5 but within 10 years, Amortized Cost 10,747  
Due after 10 years, Amortized Cost 0  
Debt securities gross, Amortized Cost 135,091  
Amortized Cost 805,515 $ 896,495
Total debt securities, Amortized Cost 805,515  
Due within 1 year, Estimated Fair Value 105,015  
Due after 1 but within 5 years, Estimated Fair Value 20,395  
Due after 5 but within 10 years, Estimated Fair Value 11,370  
Due after 10 years, Estimated Fair Value 0  
Debt securities gross, Estimated Fair Value 136,780  
Securities available for sale 831,223 $ 902,292
Total debt securities, Estimated Fair Value 831,223  
Mortgage-Backed Securities [Member]    
Investment Securities [Line Items]    
Amortized Cost [1] 670,424  
Securities available for sale [1] $ 694,443  
[1] Mortgage Backed Securities include an amortized cost of $189.3 million and a fair value of $198.4 million for Obligations of U.S. Government agencies issued by Ginnie Mae and an amortized cost of $481.1 million and a fair value of $496.0 million for Obligations of U.S. Government-sponsored enterprises issued by Fannie Mae and Freddie Mac.