XML 57 R46.htm IDEA: XBRL DOCUMENT v3.19.1
Summary of Contractual Maturity Information for Securities Available for Sale (Detail) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Investments Debt And Equity Securities [Abstract]    
Due in 1 year or less, Amortized Cost $ 528,972  
Due after 1 year through 5 years, Amortized Cost 1,011,541  
Due after 5 years through 10 years, Amortized Cost 672,446  
Due after 10 years, Amortized Cost 737,945  
Total, Amortized Cost 2,950,904  
Mortgage-backed securities, Amortized Cost 3,962,630  
Amortized Cost 6,913,534 $ 6,670,090
Due in 1 year or less, Fair Value 529,458  
Due after 1 year through 5 years, Fair Value 1,012,797  
Due after 5 years through 10 years, Fair Value 671,038  
Due after 10 years, Fair Value 759,791  
Total, Fair Value 2,973,084  
Mortgage-backed securities, Fair Value 3,918,785  
Total securities available for sale, Fair Value $ 6,891,869 $ 6,542,800