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DEBT SECURITIES - Schedule of Contractual Maturities of Securities (Details) $ in Thousands | Mar. 31, 2026 USD ($)
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Securities available-for-sale |
Within One Year | $ 3,318
After One Through Five Years | 279,612
After Five Through Ten Years | 342,311
After Ten Years | 3,308,464
Total | 3,933,705
Securities held-to-maturity, Amortized Cost |
Within One Year | 3,500
After One Through Five Years | 182,797
After Five Through Ten Years | 136,109
After Ten Years | 991,114
Total | 1,313,520
Securities held-to-maturity, Fair Value |
Within One Year | 3,500
Due in one through five years, fair value | 166,009
After Five Through Ten Years | 121,369
Due after ten years, fair value | 859,091
Total | 1,149,969
Obligations of states and political subdivisions |
Securities available-for-sale |
Within One Year | 342
After One Through Five Years | 44,871
After Five Through Ten Years | 125,131
After Ten Years | 289,525
Total | 459,869
Securities held-to-maturity, Amortized Cost |
Within One Year | 3,500
After One Through Five Years | 3,106
After Five Through Ten Years | 4,708
After Ten Years | 1,653
Total | 12,967
Securities held-to-maturity, Fair Value |
Within One Year | 3,500
Due in one through five years, fair value | 3,129
After Five Through Ten Years | 4,958
Due after ten years, fair value | 1,772
Total | 13,359
Mortgage-backed securities - residential |
Securities available-for-sale |
Within One Year | 376
After One Through Five Years | 12,295
After Five Through Ten Years | 23,170
After Ten Years | 2,771,878
Total | 2,807,719
Securities held-to-maturity, Amortized Cost |
Within One Year | 0
After One Through Five Years | 53
After Five Through Ten Years | 0
After Ten Years | 989,461
Total | 989,514
Securities held-to-maturity, Fair Value |
Within One Year | 0
Due in one through five years, fair value | 51
After Five Through Ten Years | 0
Due after ten years, fair value | 857,319
Total | 857,370
Mortgage-backed securities - commercial |
Securities available-for-sale |
Within One Year | 2,600
After One Through Five Years | 196,499
After Five Through Ten Years | 143,676
After Ten Years | 15,206
Total | 357,981
Securities held-to-maturity, Amortized Cost |
Within One Year | 0
After One Through Five Years | 179,638
After Five Through Ten Years | 131,401
After Ten Years | 0
Total | 311,039
Securities held-to-maturity, Fair Value |
Within One Year | 0
Due in one through five years, fair value | 162,829
After Five Through Ten Years | 116,411
Due after ten years, fair value | 0
Total | 279,240
Collateralized loan obligations |
Securities available-for-sale |
Within One Year | 0
After One Through Five Years | 0
After Five Through Ten Years | 0
After Ten Years | 229,708
Total | 229,708
Corporate bonds |
Securities available-for-sale |
Within One Year | 0
After One Through Five Years | 4,302
After Five Through Ten Years | 46,833
After Ten Years | 0
Total | 51,135
U.S. Treasury securities |
Securities available-for-sale |
Within One Year | 0
After One Through Five Years | 20,536
After Five Through Ten Years | 0
After Ten Years | 0
Total | 20,536
Agency debentures |
Securities available-for-sale |
Within One Year | 0
After One Through Five Years | 1,109
After Five Through Ten Years | 3,501
After Ten Years | 2,147
Total | $ 6,757

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