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Securities - Unrealized Losses on Available-for-Sale of Securities (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Fair Value |  |
Less than 12 Months | $ 1,095,830 | $ 417,782
12 Months or Longer | 394,300 | 9,266
Total | 1,490,130 | 427,048
Unrealized Losses |  |
Less than 12 Months | 20,921 | 3,014
12 Months or Longer | 11,982 | 460
Total | 32,903 | 3,474
U.S. Treasuries |  |
Fair Value |  |
Less than 12 Months | 147,810 |
12 Months or Longer | 0 |
Total | 147,810 |
Unrealized Losses |  |
Less than 12 Months | 2,542 |
12 Months or Longer | 0 |
Total | 2,542 |
Obligations of U.S. Government sponsored entities |  |
Fair Value |  |
Less than 12 Months | 362,895 | 310,711
12 Months or Longer | 289,210 | 0
Total | 652,105 | 310,711
Unrealized Losses |  |
Less than 12 Months | 6,694 | 1,992
12 Months or Longer | 8,678 | 0
Total | 15,372 | 1,992
Obligations of U.S. states and political subdivisions |  |
Fair Value |  |
Less than 12 Months | 9,700 | 8,868
12 Months or Longer | 1,283 | 0
Total | 10,983 | 8,868
Unrealized Losses |  |
Less than 12 Months | 85 | 40
12 Months or Longer | 15 | 0
Total | 100 | 40
U.S. Government agencies |  |
Fair Value |  |
Less than 12 Months | 22,074 | 10,560
12 Months or Longer | 16,846 | 1,819
Total | 38,920 | 12,379
Unrealized Losses |  |
Less than 12 Months | 160 | 396
12 Months or Longer | 372 | 250
Total | 532 | 646
U.S. Government sponsored entities |  |
Fair Value |  |
Less than 12 Months | 553,351 | 87,643
12 Months or Longer | 84,537 | 5,068
Total | 637,888 | 92,711
Unrealized Losses |  |
Less than 12 Months | 11,440 | 586
12 Months or Longer | 2,841 | 89
Total | 14,281 | 675
U.S. corporate debt securities |  |
Fair Value |  |
Less than 12 Months | 0 | 0
12 Months or Longer | 2,424 | 2,379
Total | 2,424 | 2,379
Unrealized Losses |  |
Less than 12 Months | 0 | 0
12 Months or Longer | 76 | 121
Total | $ 76 | $ 121

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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=124269663&loc=SL82922890-210455 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27337-111563 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456 + Details
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