XML 22 R60.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Investment Securities, AFS and HTM Securities Amortized Costs and Fair Values (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Sep. 30, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Investment securities available for sale        
Amortized Cost   $ 3,251,950 $ 4,041,902  
Gross Unrealized Gains   30,920 3,649  
Gross Unrealized Losses   (20,284) (98,610)  
Fair Value   3,262,586 3,946,941  
Investment securities held to maturity        
Amortized Cost   2,205,083 2,740,511  
Gross Unrealized Gains   79,744 17,593  
Held-to-maturity, Gross Unrealized Loss   (8,363) (47,835)  
Fair Value   2,276,465 2,710,271  
Transfer of held to maturity securities to available for sale securities (adoption of ASU 2019-04) $ 692,000 692,414 0 $ 0
U.S. Treasury securities        
Investment securities available for sale        
Amortized Cost     1,000  
Gross Unrealized Gains     0  
Gross Unrealized Losses     (1)  
Fair Value     999  
Investment securities held to maturity        
Amortized Cost   999    
Gross Unrealized Gains   19    
Held-to-maturity, Gross Unrealized Loss   0    
Fair Value   1,018    
Obligations of state and political subdivisions (municipal securities)(a)        
Investment securities available for sale        
Amortized Cost   529,908    
Gross Unrealized Gains   16,269    
Gross Unrealized Losses   (18)    
Fair Value   546,160    
Investment securities held to maturity        
Amortized Cost   1,418,569 1,790,683  
Gross Unrealized Gains   69,775 8,255  
Held-to-maturity, Gross Unrealized Loss   (1,118) (15,279)  
Fair Value   1,487,227 1,783,659  
Private-label        
Investment securities available for sale        
Amortized Cost     1,007  
Gross Unrealized Gains     0  
Gross Unrealized Losses     (4)  
Fair Value     1,003  
FFELP asset backed securities        
Investment securities available for sale        
Amortized Cost   270,178 297,347  
Gross Unrealized Gains   0 711  
Gross Unrealized Losses   (6,485) (698)  
Fair Value   263,693 297,360  
Fixed-income securities        
Investment securities available for sale        
Amortized Cost   3,000 3,000  
Gross Unrealized Gains   0 0  
Gross Unrealized Losses   0 0  
Fair Value   3,000 3,000  
FNMA/FHLMC [Member] | Residential Related Securities        
Investment securities available for sale        
Amortized Cost   131,158 296,296  
Gross Unrealized Gains   1,562 2,466  
Gross Unrealized Losses   (59) (3,510)  
Fair Value   132,660 295,252  
Investment securities held to maturity        
Amortized Cost   81,676 92,788  
Gross Unrealized Gains   1,759 169  
Held-to-maturity, Gross Unrealized Loss   (15) (1,795)  
Fair Value   83,420 91,162  
FNMA/FHLMC [Member] | Commercial mortgage-related securities        
Investment securities available for sale        
Amortized Cost   19,929    
Gross Unrealized Gains   1,799    
Gross Unrealized Losses   0    
Fair Value   21,728    
Investment securities held to maturity        
Amortized Cost   0    
Fair Value   0    
GNMA [Member] | Residential Related Securities        
Investment securities available for sale        
Amortized Cost   982,941 2,169,943  
Gross Unrealized Gains   3,887 473  
Gross Unrealized Losses   (1,689) (41,885)  
Fair Value   985,139 2,128,531  
Investment securities held to maturity        
Amortized Cost   269,523 351,606  
Gross Unrealized Gains   1,882 1,611  
Held-to-maturity, Gross Unrealized Loss   (1,108) (8,181)  
Fair Value   270,296 345,035  
GNMA [Member] | Commercial mortgage-related securities        
Investment securities available for sale        
Amortized Cost   1,314,836 1,273,309  
Gross Unrealized Gains   7,403 0  
Gross Unrealized Losses   (12,032) (52,512)  
Fair Value   1,310,207 1,220,797  
Investment securities held to maturity        
Amortized Cost   434,317 505,434  
Gross Unrealized Gains   6,308 7,559  
Held-to-maturity, Gross Unrealized Loss   (6,122) (22,579)  
Fair Value   $ 434,503 $ 490,414