XML 75 R59.htm IDEA: XBRL DOCUMENT v3.3.1.900
Investment Securities - Summary of Amortized Cost and Estimated Fair Value of Investment Securities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]    
Amortized Cost, Available-for-sale $ 2,337,715 $ 3,083,582
Gross Unrealized Holding Gain, Available-for-sale 33,776 65,754
Gross Unrealized Holding Loss, Available-for-sale (2,845) (12,178)
Fair Value, Available-for-sale $ 2,368,646 $ 3,137,158
Total Percent, Available-for-sale 100.00% 100.00%
Amortized Cost, Held-to-maturity $ 850,989 $ 1,528
Gross Unrealized Holding Gain, Held-to-maturity 4,796 649
Gross Unrealized Holding Loss, Held-to-maturity (2,746) 0
Fair Value, Held-to-maturity $ 853,039 $ 2,177
Total Percent, Held-to-maturity 100.00% 100.00%
CMO's/REMIC's - Residential [Member]    
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]    
Amortized Cost, Available-for-sale $ 380,166 $ 297,318
Gross Unrealized Holding Gain, Available-for-sale 4,689 7,050
Gross Unrealized Holding Loss, Available-for-sale (1,074) (277)
Fair Value, Available-for-sale $ 383,781 $ 304,091
Total Percent, Available-for-sale 16.20% 9.69%
Amortized Cost, Held-to-maturity $ 1,284 $ 1,528
Gross Unrealized Holding Gain, Held-to-maturity 569 649
Gross Unrealized Holding Loss, Held-to-maturity 0 0
Fair Value, Held-to-maturity $ 1,853 $ 2,177
Total Percent, Held-to-maturity 0.15% 100.00%
Government Agency/GSEs [Member]    
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]    
Amortized Cost, Available-for-sale $ 5,752 $ 339,071
Gross Unrealized Holding Gain, Available-for-sale   0
Gross Unrealized Holding Loss, Available-for-sale (7) (8,228)
Fair Value, Available-for-sale $ 5,745 $ 330,843
Total Percent, Available-for-sale 0.24% 10.55%
Amortized Cost, Held-to-maturity $ 293,338  
Gross Unrealized Holding Gain, Held-to-maturity 1,176  
Gross Unrealized Holding Loss, Held-to-maturity (734)  
Fair Value, Held-to-maturity $ 293,780  
Total Percent, Held-to-maturity 34.47%  
Residential Mortgage-backed Securities [Member]    
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]    
Amortized Cost, Available-for-sale $ 1,788,857 $ 1,884,370
Gross Unrealized Holding Gain, Available-for-sale 26,001 36,154
Gross Unrealized Holding Loss, Available-for-sale (1,761) (3,028)
Fair Value, Available-for-sale $ 1,813,097 $ 1,917,496
Total Percent, Available-for-sale 76.55% 61.12%
Amortized Cost, Held-to-maturity $ 232,053  
Gross Unrealized Holding Gain, Held-to-maturity 0  
Gross Unrealized Holding Loss, Held-to-maturity (1,293)  
Fair Value, Held-to-maturity $ 230,760  
Total Percent, Held-to-maturity 27.27%  
Municipal Bonds [Member]    
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]    
Amortized Cost, Available-for-sale $ 157,940 $ 557,823
Gross Unrealized Holding Gain, Available-for-sale 3,036 22,463
Gross Unrealized Holding Loss, Available-for-sale (3) (645)
Fair Value, Available-for-sale $ 160,973 $ 579,641
Total Percent, Available-for-sale 6.80% 18.48%
Amortized Cost, Held-to-maturity $ 324,314  
Gross Unrealized Holding Gain, Held-to-maturity 3,051  
Gross Unrealized Holding Loss, Held-to-maturity (719)  
Fair Value, Held-to-maturity $ 326,646  
Total Percent, Held-to-maturity 38.11%  
Other Securities [Member]    
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]    
Amortized Cost, Available-for-sale $ 5,000 $ 5,000
Gross Unrealized Holding Gain, Available-for-sale 50 87
Gross Unrealized Holding Loss, Available-for-sale   0
Fair Value, Available-for-sale $ 5,050 $ 5,087
Total Percent, Available-for-sale 0.21% 0.16%