SECURITIES (Tables)
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3 Months Ended |
Mar. 31, 2026 |
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| Investments, Debt and Equity Securities [Abstract] |
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| Schedule of Available-For-Sale Securities |
The amortized cost and fair value of securities available for sale were as follows: | | | | | | | | | | | | | | | | | | | | | | | | | March 31, 2026 | Amortized
Cost | | Gross
Unrealized
Gains | | Gross
Unrealized
Losses | | Fair
Value | | (In thousands) | | Available for Sale | | | | | | | | | U.S. government and agency securities | $ | 89,315 | | | $ | 546 | | | $ | (2,216) | | | $ | 87,645 | | | Municipal securities | 217,653 | | | 355 | | | (24,389) | | | 193,619 | | | Agency mortgage-backed pass-through securities | 839,002 | | | 2,252 | | | (35,367) | | | 805,887 | | | Agency collateralized mortgage obligations | 723,509 | | | 1,483 | | | (51,007) | | | 673,985 | | | Corporate bonds and other | 107,861 | | | 678 | | | (4,965) | | | 103,574 | | | Total | $ | 1,977,340 | | | $ | 5,314 | | | $ | (117,944) | | | $ | 1,864,710 | |
| | | | | | | | | | | | | | | | | | | | | | | | | December 31, 2025 | Amortized
Cost | | Gross
Unrealized
Gains | | Gross
Unrealized
Losses | | Fair
Value | | (In thousands) | | Available for Sale | | | | | | | | | U.S. government and agency securities | $ | 394,361 | | | $ | 497 | | | $ | (2,383) | | | $ | 392,475 | | | Municipal securities | 218,143 | | | 627 | | | (22,569) | | | 196,201 | | | Agency mortgage-backed pass-through securities | 831,815 | | | 5,548 | | | (29,377) | | | 807,986 | | | Agency collateralized mortgage obligations | 737,627 | | | 3,375 | | | (43,937) | | | 697,065 | | | Corporate bonds and other | 108,820 | | | 564 | | | (4,652) | | | 104,732 | | | Total | $ | 2,290,766 | | | $ | 10,611 | | | $ | (102,918) | | | $ | 2,198,459 | |
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| Schedule of Investments Classified by Contractual Maturity Date |
The amortized cost and fair value of investment securities at March 31, 2026, by contractual maturity, are shown below. Expected maturity may differ from contractual maturity if borrowers have the right to call or prepay obligations at any time with or without call or prepayment penalties. | | | | | | | | | | | | | | | | | Amortized
Cost | | Fair
Value | | (In thousands) | | Due in one year or less | | $ | 2,963 | | | $ | 3,011 | | | Due after one year through five years | | 22,651 | | | 21,303 | | | Due after five years through ten years | | 153,598 | | | 142,929 | | | Due after ten years | | 235,617 | | | 217,595 | | | Subtotal | | 414,829 | | | 384,838 | | Agency mortgage-backed pass-through securities and collateralized mortgage obligations | | 1,562,511 | | | 1,479,872 | | | Total | | $ | 1,977,340 | | | $ | 1,864,710 | |
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| Schedule of Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |
Securities with unrealized losses segregated by length of time in a continuous loss position were as follows: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | March 31, 2026 | | Less than 12 Months | | More than 12 Months | | Total | Estimated
Fair Value | | Unrealized
Losses | | Estimated
Fair Value | | Unrealized
Losses | | Estimated
Fair Value | | Unrealized
Losses | | (In thousands) | | Available for Sale | | | | | | | | | | | | | U.S. government and agency securities | $ | 11,911 | | | $ | (184) | | | $ | 47,236 | | | $ | (2,032) | | | $ | 59,147 | | | $ | (2,216) | | | Municipal securities | 12,226 | | | (889) | | | 165,897 | | | (23,500) | | | 178,123 | | | (24,389) | | Agency mortgage-backed pass-through securities | 338,489 | | | (5,617) | | | 234,061 | | | (29,750) | | | 572,550 | | | (35,367) | | | Agency collateralized mortgage obligations | 147,257 | | | (2,430) | | | 338,541 | | | (48,577) | | | 485,798 | | | (51,007) | | | Corporate bonds and other | 21,533 | | | (468) | | | 49,370 | | | (4,497) | | | 70,903 | | | (4,965) | | | Total | $ | 531,416 | | | $ | (9,588) | | | $ | 835,105 | | | $ | (108,356) | | | $ | 1,366,521 | | | $ | (117,944) | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | December 31, 2025 | | Less than 12 Months | | More than 12 Months | | Total | Estimated
Fair Value | | Unrealized
Losses | | Estimated
Fair Value | | Unrealized
Losses | | Estimated
Fair Value | | Unrealized
Losses | | (In thousands) | | Available for Sale | | | | | | | | | | | | | U.S. government and agency securities | $ | 185,275 | | | $ | (180) | | | $ | 51,684 | | | $ | (2,203) | | | $ | 236,959 | | | $ | (2,383) | | | Municipal securities | 6,091 | | | (725) | | | 170,400 | | | (21,844) | | | 176,491 | | | (22,569) | | Agency mortgage-backed pass-through securities | 157,352 | | | (1,390) | | | 279,693 | | | (27,987) | | | 437,045 | | | (29,377) | | | Agency collateralized mortgage obligations | 65,444 | | | (1,006) | | | 357,857 | | | (42,931) | | | 423,301 | | | (43,937) | | | Corporate bonds and other | 21,255 | | | (193) | | | 50,384 | | | (4,459) | | | 71,639 | | | (4,652) | | | Total | $ | 435,417 | | | $ | (3,494) | | | $ | 910,018 | | | $ | (99,424) | | | $ | 1,345,435 | | | $ | (102,918) | |
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