XML 78 R62.htm IDEA: XBRL DOCUMENT v3.6.0.2
Investment Securities - Summary of Continuous Unrealized Loss Position of Securities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Schedule of Investments [Line Items]    
Fair Value, Less Than 12 Months, Available-for-sale $ 734,993 $ 615,765
Gross Unrealized Holding Losses, Less Than 12 Months, Available-for-sale (8,671) (2,844)
Fair Value, 12 Months or Longer, Available-for-sale 5,981 5,961
Gross Unrealized Holding Losses, 12 Months or Longer, Available-for-sale (1) (1)
Fair Value, Available-for-sale 740,974 621,726
Gross Unrealized Holding Losses, Available-for-sale (8,672) (2,845)
Fair Value, Less Than 12 Months, Held-to-maturity 652,076 425,374
Gross Unrealized Holding Losses, Less Than 12 Months, Held-to-maturity (14,383) (2,746)
Fair Value, 12 Months or Longer, Held-to-maturity 36,971  
Gross Unrealized Holding Losses, 12 Months or Longer, Held-to-maturity (1,057)  
Fair Value, Held-to-maturity 689,047 425,374
Gross Unrealized Holding Losses, Held-to-maturity (15,440) (2,746)
CMO/REMIC - Residential [Member]    
Schedule of Investments [Line Items]    
Fair Value, Less Than 12 Months, Available-for-sale 128,595 171,923
Gross Unrealized Holding Losses, Less Than 12 Months, Available-for-sale (1,485) (1,074)
Fair Value, Available-for-sale 128,595 171,923
Gross Unrealized Holding Losses, Available-for-sale (1,485) (1,074)
Fair Value, Less Than 12 Months, Held-to-maturity 237,611  
Gross Unrealized Holding Losses, Less Than 12 Months, Held-to-maturity (6,808)  
Fair Value, Held-to-maturity 237,611  
Gross Unrealized Holding Losses, Held-to-maturity (6,808)  
Government Agency/GSE [Member]    
Schedule of Investments [Line Items]    
Fair Value, Less Than 12 Months, Available-for-sale   5,745
Gross Unrealized Holding Losses, Less Than 12 Months, Available-for-sale   (7)
Fair Value, Available-for-sale   5,745
Gross Unrealized Holding Losses, Available-for-sale   (7)
Fair Value, Less Than 12 Months, Held-to-maturity 76,854 84,495
Gross Unrealized Holding Losses, Less Than 12 Months, Held-to-maturity (1,972) (734)
Fair Value, Held-to-maturity 76,854 84,495
Gross Unrealized Holding Losses, Held-to-maturity (1,972) (734)
Residential Mortgage-backed Securities [Member]    
Schedule of Investments [Line Items]    
Fair Value, Less Than 12 Months, Available-for-sale 583,143 437,699
Gross Unrealized Holding Losses, Less Than 12 Months, Available-for-sale (6,232) (1,761)
Fair Value, Available-for-sale 583,143 437,699
Gross Unrealized Holding Losses, Available-for-sale (6,232) (1,761)
Fair Value, Less Than 12 Months, Held-to-maturity 191,807 230,760
Gross Unrealized Holding Losses, Less Than 12 Months, Held-to-maturity (1,892) (1,293)
Fair Value, Held-to-maturity 191,807 230,760
Gross Unrealized Holding Losses, Held-to-maturity (1,892) (1,293)
Municipal Bonds [Member]    
Schedule of Investments [Line Items]    
Fair Value, Less Than 12 Months, Available-for-sale 23,255 398
Gross Unrealized Holding Losses, Less Than 12 Months, Available-for-sale (954) (2)
Fair Value, 12 Months or Longer, Available-for-sale 5,981 5,961
Gross Unrealized Holding Losses, 12 Months or Longer, Available-for-sale (1) (1)
Fair Value, Available-for-sale 29,236 6,359
Gross Unrealized Holding Losses, Available-for-sale (955) (3)
Fair Value, Less Than 12 Months, Held-to-maturity 145,804 110,119
Gross Unrealized Holding Losses, Less Than 12 Months, Held-to-maturity (3,711) (719)
Fair Value, 12 Months or Longer, Held-to-maturity 36,971  
Gross Unrealized Holding Losses, 12 Months or Longer, Held-to-maturity (1,057)  
Fair Value, Held-to-maturity 182,775 110,119
Gross Unrealized Holding Losses, Held-to-maturity $ (4,768) $ (719)