XML 62 R51.htm IDEA: XBRL DOCUMENT v3.19.2
Investment Securities - Amortized Cost and Estimated Fair Value of Debt Securities Available for Sale (Detail) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Net Investment Income [Line Items]    
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value $ 60,826  
Due after five but within ten years, Amortized Cost 26,206  
Due after one but within five years, Amortized Cost 32,735  
Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Amortized Cost [1] 802,241  
Due within one year, Amortized Cost 59,571  
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost 630  
Due after ten years, Amortized Cost 0  
Corporate/Mortgage-Backed Securities, Amortized cost [1] 805,077  
Amortized Cost 861,812 $ 924,054
Due within one year, Estimated Fair Value 631  
Due after one but within five years, Estimated Fair Value 33,334  
Due after five but within ten years, Estimated Fair Value 26,861  
Due after ten years, Estimated Fair Value 0  
Securities available for sale, at fair value 865,903 909,247
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 8,204 2,998
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 4,113 17,805
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]    
Net Investment Income [Line Items]    
Amortized Cost 625,200  
Securities available for sale, at fair value 625,600  
Debt Securities [Member]    
Net Investment Income [Line Items]    
Amortized Cost 861,812  
Securities available for sale, at fair value 865,903  
Corporate Debt Securities [Member]    
Net Investment Income [Line Items]    
Securities available for sale, at fair value 23,934 21,012
Obligations of States and Political Subdivisions [Member]    
Net Investment Income [Line Items]    
Securities available for sale, at fair value 26,889 27,712
Obligations of U.S. Government-Sponsored Enterprises - Other Government-Sponsored Enterprises [Member]    
Net Investment Income [Line Items]    
Securities available for sale, at fair value 10,003 10,012
Residential Mortgage Backed Securities [Member]    
Net Investment Income [Line Items]    
Securities available for sale, at fair value 625,579 $ 673,361
US Government Agencies Debt Securities [Member]    
Net Investment Income [Line Items]    
Amortized Cost 177,000  
Securities available for sale, at fair value $ 179,500  
[1] Mortgage-Backed Securities include an amortized cost of $177.0 million and a fair value of $179.5 million for Obligations of U.S. Government agencies issued by Ginnie Mae and an amortized cost of $625.2 million and a fair value of $625.6 million for Obligations of U.S. Government-sponsored enterprises issued by Fannie Mae and Freddie Mac.