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Securities (Tables) | 6 Months Ended
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Jun. 30, 2022
Investments, Debt and Equity Securities [Abstract] |
Schedule of available-for-sale securities | The following tables summarize available-for-sale debt securities held by the Company at June 30, 2022 and December 31, 2021:
| Available-for-Sale Debt Securities
June 30, 2022 | Amortized Cost | Gross Unrealized Gains | Gross Unrealized Losses | Fair Value
(In thousands) |  |  |  |
U.S. Treasuries | $ | 191,051 |  | $ | 0 |  | $ | 16,949 |  | $ | 174,102 |
Obligations of U.S. Government sponsored entities | 863,235 |  | 36 |  | 69,778 |  | 793,493 |
Obligations of U.S. states and political subdivisions | 95,661 |  | 54 |  | 7,637 |  | 88,078 |
Mortgage-backed securities – residential, issued by |  |  |  |
U.S. Government agencies | 63,185 |  | 38 |  | 4,109 |  | 59,114 |
U.S. Government sponsored entities | 859,388 |  | 18 |  | 84,835 |  | 774,571 |
U.S. corporate debt securities | 2,500 |  | 0 |  | 140 |  | 2,360 |
Total available-for-sale debt securities | $ | 2,075,020 |  | $ | 146 |  | $ | 183,448 |  | $ | 1,891,718 |
| Available-for-Sale Debt Securities
December 31, 2021 | Amortized Cost | Gross Unrealized Gains | Gross Unrealized Losses | Fair Value
(In thousands) |  |  |  |
U.S. Treasuries | $ | 160,291 |  | $ | 85 |  | $ | 2,542 |  | $ | 157,834 |
Obligations of U.S. Government sponsored entities | 843,218 |  | 4,527 |  | 15,372 |  | 832,373 |
Obligations of U.S. states and political subdivisions | 102,177 |  | 2,092 |  | 100 |  | 104,169 |
Mortgage-backed securities – residential, issued by |  |  |  |
U.S. Government agencies | 76,502 |  | 1,187 |  | 532 |  | 77,157 |
U.S. Government sponsored entities | 879,102 |  | 5,735 |  | 14,281 |  | 870,556 |
U.S. corporate debt securities | 2,500 |  | 0 |  | 76 |  | 2,424 |
Total available-for-sale debt securities | $ | 2,063,790 |  | $ | 13,626 |  | $ | 32,903 |  | $ | 2,044,513 |
Schedule of held-to-maturity securities | The following tables summarize held-to-maturity debt securities held by the Company at June 30, 2022 and December 31, 2021:
| Held-to-Maturity Securities
June 30, 2022 | Amortized Cost | Gross Unrealized Gains | Gross Unrealized Losses | Fair Value
(In thousands) |  |  |  |
U.S. Treasuries | $ | 86,582 |  | $ | 0 |  | $ | 9,237 |  | $ | 77,345 |
Obligations of U.S. Government sponsored entities | 225,733 |  | 0 |  | 28,418 |  | 197,315 |
Total held-to-maturity debt securities | $ | 312,315 |  | $ | 0 |  | $ | 37,655 |  | $ | 274,660 |
| Held-to-Maturity Securities
December 31, 2021 | Amortized Cost | Gross Unrealized Gains | Gross Unrealized Losses | Fair Value
(In thousands) |  |  |  |
U.S. Treasuries | $ | 86,689 |  | $ | 279 |  | $ | 600 |  | $ | 86,368 |
Obligations of U.S. Government sponsored entities | 197,320 |  | 389 |  | 1,789 |  | 195,920 |
Total held-to-maturity debt securities | $ | 284,009 |  | $ | 668 |  | $ | 2,389 |  | $ | 282,288 |
Schedule of available-for-sale securities with unrealized losses | The following table summarizes available-for-sale debt securities that had unrealized losses at June 30, 2022, and December 31, 2021:
June 30, 2022 | Less than 12 Months | 12 Months or Longer | Total
(In thousands) | Fair Value | Unrealized Losses | Fair Value | Unrealized Losses | Fair Value | Unrealized Losses
U.S. Treasuries | $ | 169,550 |  | $ | 16,547 |  | $ | 4,552 |  | $ | 402 |  | $ | 174,102 |  | $ | 16,949 |
Obligations of U.S. Government sponsored entities | 353,414 |  | 23,720 |  | 411,422 |  | 46,058 |  | 764,836 |  | 69,778 |
Obligations of U.S. states and political subdivisions | 71,476 |  | 6,901 |  | 3,123 |  | 736 |  | 74,599 |  | 7,637 |
Mortgage-backed securities – residential, issued by |  |  |  |  |  |
U.S. Government agencies | 36,509 |  | 1,299 |  | 21,389 |  | 2,810 |  | 57,898 |  | 4,109 |
U.S. Government sponsored entities | 520,389 |  | 35,937 |  | 250,441 |  | 48,898 |  | 770,830 |  | 84,835 |
U.S. corporate debt securities | 0 |  | 0 |  | 2,360 |  | 140 |  | 2,360 |  | 140 |
Total available-for-sale debt securities | $ | 1,151,338 |  | $ | 84,404 |  | $ | 693,287 |  | $ | 99,044 |  | $ | 1,844,625 |  | $ | 183,448 |
December 31, 2021 | Less than 12 Months | 12 Months or Longer | Total
(In thousands) | Fair Value | Unrealized Losses | Fair Value | Unrealized Losses | Fair Value | Unrealized Losses
U.S. Treasuries | $ | 147,810 |  | $ | 2,542 |  | $ | 0 |  | $ | 0 |  | $ | 147,810 |  | $ | 2,542 |
Obligations of U.S. Government sponsored entities | 362,895 |  | 6,694 |  | 289,210 |  | 8,678 |  | 652,105 |  | 15,372 |
Obligations of U.S. states and political subdivisions | 9,700 |  | 85 |  | 1,283 |  | 15 |  | 10,983 |  | 100 |
Mortgage-backed securities – residential, issued by |  |  |  |  |  |
U.S. Government agencies | 22,074 |  | 160 |  | 16,846 |  | 372 |  | 38,920 |  | 532 |
U.S. Government sponsored entities | 553,351 |  | 11,440 |  | 84,537 |  | 2,841 |  | 637,888 |  | 14,281 |
U.S. corporate debt securities | 0 |  | 0 |  | 2,424 |  | 76 |  | 2,424 |  | 76 |
Total available-for-sale debt securities | $ | 1,095,830 |  | $ | 20,921 |  | $ | 394,300 |  | $ | 11,982 |  | $ | 1,490,130 |  | $ | 32,903 |
Schedule held-to-maturity securities with unrealized losses | The following table summarizes held-to-maturity debt securities that had unrealized losses at June 30, 2022 and December 31, 2021:
June 30, 2022 | Less than 12 Months | 12 Months or Longer | Total
(In thousands) | Fair Value | Unrealized Losses | Fair Value | Unrealized Losses | Fair Value | Unrealized Losses
U.S. Treasuries | $ | 77,345 |  | $ | 9,237 |  | $ | 0 |  | $ | 0 |  | $ | 77,345 |  | $ | 9,237 |
Obligations of U.S. Government sponsored entities | 197,315 |  | 28,418 |  | $ | 0 |  | $ | 0 |  | $ | 197,315 |  | 28,418 |
Total held-to-maturity debt securities | $ | 274,660 |  | $ | 37,655 |  | $ | 0 |  | $ | 0 |  | $ | 274,660 |  | $ | 37,655 |
December 31, 2021 | Less than 12 Months | 12 Months or Longer | Total
(In thousands) | Fair Value | Unrealized Losses | Fair Value | Unrealized Losses | Fair Value | Unrealized Losses
U.S. Treasuries | $ | 35,280 |  | $ | 600 |  | $ | 0 |  | $ | 0 |  | $ | 35,280 |  | $ | 600 |
Obligations of U.S. Government sponsored entities | 84,592 |  | 1,789 |  | 0 |  | 0 |  | 84,592 |  | 1,789 |
Total held-to-maturity debt securities | $ | 119,872 |  | $ | 2,389 |  | $ | 0 |  | $ | 0 |  | $ | 119,872 |  | $ | 2,389 |
Schedule of amortized cost and estimated fair value of debt securities by contractual maturity |
June 30, 2022 |  |
(In thousands) | Amortized Cost | Fair Value
Available-for-sale debt securities: |  |
Due in one year or less | $ | 61,909 |  | $ | 61,879 |
Due after one year through five years | 534,330 |  | 503,095 |
Due after five years through ten years | 505,724 |  | 451,324 |
Due after ten years | 50,484 |  | 41,735 |
Total | 1,152,447 |  | 1,058,033 |
Mortgage-backed securities | 922,573 |  | 833,685 |
Total available-for-sale debt securities | $ | 2,075,020 |  | $ | 1,891,718 |
December 31, 2021 |  |
(In thousands) | Amortized Cost | Fair Value
Available-for-sale debt securities: |  |
Due in one year or less | $ | 77,159 |  | $ | 77,892 |
Due after one year through five years | 474,537 |  | 471,776 |
Due after five years through ten years | 501,748 |  | 492,573 |
Due after ten years | 54,742 |  | 54,559 |
Total | 1,108,186 |  | 1,096,800 |
Mortgage-backed securities | 955,604 |  | 947,713 |
Total available-for-sale debt securities | $ | 2,063,790 |  | $ | 2,044,513 |
June 30, 2022 |  |
(In thousands) | Amortized Cost | Fair Value
Held-to-maturity debt securities: |  |
Due after five years through ten years | $ | 312,315 |  | $ | 274,660 |
Total held-to-maturity debt securities | $ | 312,315 |  | $ | 274,660 |
December 31, 2021 |  |
(In thousands) | Amortized Cost | Fair Value
Held-to-maturity debt securities: |  |
Due after five years through ten years | $ | 284,009 |  | $ | 282,288 |
Total held-to-maturity debt securities | $ | 284,009 |  | $ | 282,288 |

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