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DEBT SECURITIES - Schedule of Contractual Maturities of Securities (Details) $ in Thousands | Sep. 30, 2025 USD ($)
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Securities available-for-sale |
Within One Year | $ 3,251
After One Through Five Years | 277,898
After Five Through Ten Years | 329,302
After Ten Years | 2,880,027
Total | 3,490,478
Securities held-to-maturity, Amortized Cost |
Within One Year | 5,244
After One Through Five Years | 143,406
After Five Through Ten Years | 175,853
After Ten Years | 1,039,133
Total | 1,363,636
Securities held-to-maturity, Fair Value |
Within One Year | 5,243
Due in one through five years, fair value | 130,122
After Five Through Ten Years | 156,151
Due after ten years, fair value | 894,744
Total | 1,186,260
Obligations of states and political subdivisions |
Securities available-for-sale |
Within One Year | 345
After One Through Five Years | 45,276
After Five Through Ten Years | 90,330
After Ten Years | 331,919
Total | 467,870
Securities held-to-maturity, Amortized Cost |
Within One Year | 5,244
After One Through Five Years | 3,592
After Five Through Ten Years | 4,621
After Ten Years | 1,625
Total | 15,082
Securities held-to-maturity, Fair Value |
Within One Year | 5,243
Due in one through five years, fair value | 3,635
After Five Through Ten Years | 4,966
Due after ten years, fair value | 1,732
Total | 15,576
Mortgage-backed securities - residential |
Securities available-for-sale |
Within One Year | 446
After One Through Five Years | 16,887
After Five Through Ten Years | 26,601
After Ten Years | 2,330,221
Total | 2,374,155
Securities held-to-maturity, Amortized Cost |
Within One Year | 0
After One Through Five Years | 58
After Five Through Ten Years | 0
After Ten Years | 1,037,508
Total | 1,037,566
Securities held-to-maturity, Fair Value |
Within One Year | 0
Due in one through five years, fair value | 57
After Five Through Ten Years | 0
Due after ten years, fair value | 893,012
Total | 893,069
Mortgage-backed securities - commercial |
Securities available-for-sale |
Within One Year | 2,460
After One Through Five Years | 190,384
After Five Through Ten Years | 158,333
After Ten Years | 27,001
Total | 378,178
Securities held-to-maturity, Amortized Cost |
Within One Year | 0
After One Through Five Years | 139,756
After Five Through Ten Years | 171,232
After Ten Years | 0
Total | 310,988
Securities held-to-maturity, Fair Value |
Within One Year | 0
Due in one through five years, fair value | 126,430
After Five Through Ten Years | 151,185
Due after ten years, fair value | 0
Total | 277,615
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 | 188,689
Total | 188,689
Corporate bonds |
Securities available-for-sale |
Within One Year | 0
After One Through Five Years | 3,388
After Five Through Ten Years | 50,096
After Ten Years | 0
Total | 53,484
U.S. Treasury securities |
Securities available-for-sale |
Within One Year | 0
After One Through Five Years | 20,579
After Five Through Ten Years | 0
After Ten Years | 0
Total | 20,579
Agency debentures |
Securities available-for-sale |
Within One Year | 0
After One Through Five Years | 1,384
After Five Through Ten Years | 3,942
After Ten Years | 2,197
Total | $ 7,523

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