XML 73 R61.htm IDEA: XBRL DOCUMENT v3.25.0.1
Investment Securities - Summary of Continuous Unrealized Loss Position of Securities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Schedule of Investments [Line Items]    
Fair Value, Less Than 12 Months, Available-for-sale $ 207,644 $ 3,334
Gross Unrealized Holding Loss, Less than 12 Months, Available-for-sale (855) (17)
Fair Value, 12 Months or Longer, Available-for-sale 2,124,849 2,913,626
Gross Unrealized Holding Losses, 12 Months or Longer, Available-for-sale (447,326) (449,850)
Fair Value, Available-for-sale 2,332,493 2,916,960
Gross Unrealized Holding Losses, Available-for-sale (448,181) (449,867)
Fair Value, Less Than 12 Months, Held-to-maturity 65,740 20,609
Gross Unrealized Holding Loss, Less than 12 Months, Held-to-maturity (1,109) (200)
Fair Value, 12 Months or Longer, Held-to-maturity 1,811,354 1,938,543
Gross Unrealized Holding Losses, 12 Months or Longer, Held-to-maturity (425,372) (384,967)
Fair Value, Held-to-maturity 1,877,094 1,959,152
Gross Unrealized Holding Losses, Held-to-maturity (426,481) (385,167)
CMO/REMIC [Member]    
Schedule of Investments [Line Items]    
Fair Value, Less Than 12 Months, Available-for-sale 1 0
Gross Unrealized Holding Loss, Less than 12 Months, Available-for-sale 0 0
Fair Value, 12 Months or Longer, Available-for-sale 351,521 389,359
Gross Unrealized Holding Losses, 12 Months or Longer, Available-for-sale (120,399) (112,872)
Fair Value, Available-for-sale 351,522 389,359
Gross Unrealized Holding Losses, Available-for-sale (120,399) (112,872)
Fair Value, Less Than 12 Months, Held-to-maturity 0 0
Gross Unrealized Holding Loss, Less than 12 Months, Held-to-maturity 0 0
Fair Value, 12 Months or Longer, Held-to-maturity 613,937 646,737
Gross Unrealized Holding Losses, 12 Months or Longer, Held-to-maturity (170,121) (156,155)
Fair Value, Held-to-maturity 613,937 646,737
Gross Unrealized Holding Losses, Held-to-maturity (170,121) (156,155)
Government Agency/GSE [Member]    
Schedule of Investments [Line Items]    
Fair Value, Less Than 12 Months, Available-for-sale   0
Gross Unrealized Holding Loss, Less than 12 Months, Available-for-sale   0
Fair Value, 12 Months or Longer, Available-for-sale   0
Gross Unrealized Holding Losses, 12 Months or Longer, Available-for-sale   0
Fair Value, Available-for-sale   0
Gross Unrealized Holding Losses, Available-for-sale   0
Fair Value, Less Than 12 Months, Held-to-maturity 0 0
Gross Unrealized Holding Loss, Less than 12 Months, Held-to-maturity 0 0
Fair Value, 12 Months or Longer, Held-to-maturity 408,257 432,684
Gross Unrealized Holding Losses, 12 Months or Longer, Held-to-maturity (106,315) (97,972)
Fair Value, Held-to-maturity 408,257 432,684
Gross Unrealized Holding Losses, Held-to-maturity (106,315) (97,972)
Mortgage-backed Securities [Member]    
Schedule of Investments [Line Items]    
Fair Value, Less Than 12 Months, Available-for-sale 204,428 48
Gross Unrealized Holding Loss, Less than 12 Months, Available-for-sale (700) 0
Fair Value, 12 Months or Longer, Available-for-sale 1,757,066 2,506,162
Gross Unrealized Holding Losses, 12 Months or Longer, Available-for-sale (325,677) (336,107)
Fair Value, Available-for-sale 1,961,494 2,506,210
Gross Unrealized Holding Losses, Available-for-sale (326,377) (336,107)
Fair Value, Less Than 12 Months, Held-to-maturity 2,072 0
Gross Unrealized Holding Loss, Less than 12 Months, Held-to-maturity (42) 0
Fair Value, 12 Months or Longer, Held-to-maturity 502,292 565,655
Gross Unrealized Holding Losses, 12 Months or Longer, Held-to-maturity (109,978) (97,436)
Fair Value, Held-to-maturity 504,364 565,655
Gross Unrealized Holding Losses, Held-to-maturity (110,020) (97,436)
Municipal Bonds [Member]    
Schedule of Investments [Line Items]    
Fair Value, Less Than 12 Months, Available-for-sale 3,215 3,286
Gross Unrealized Holding Loss, Less than 12 Months, Available-for-sale (155) (17)
Fair Value, 12 Months or Longer, Available-for-sale 16,262 18,105
Gross Unrealized Holding Losses, 12 Months or Longer, Available-for-sale (1,250) (871)
Fair Value, Available-for-sale 19,477 21,391
Gross Unrealized Holding Losses, Available-for-sale (1,405) (888)
Fair Value, Less Than 12 Months, Held-to-maturity 63,668 20,609
Gross Unrealized Holding Loss, Less than 12 Months, Held-to-maturity (1,067) (200)
Fair Value, 12 Months or Longer, Held-to-maturity 286,868 293,467
Gross Unrealized Holding Losses, 12 Months or Longer, Held-to-maturity (38,958) (33,404)
Fair Value, Held-to-maturity 350,536 314,076
Gross Unrealized Holding Losses, Held-to-maturity $ (40,025) $ (33,604)