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Investment Securities - Available for Sale Securities Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Fair Value |  |
Less Than 12 Months | $ 561,256 | $ 688,212
12 Months or Greater | 57,902 | 27,099
Total | 619,158 | 715,311
Gross Unrealized Losses |  |
Less Than 12 Months | (33,855) | (11,044)
12 Months or Greater | (6,357) | (865)
Total | (40,212) | (11,909)
U.S. treasury securities |  |
Fair Value |  |
Less Than 12 Months | 85,998 | 87,302
12 Months or Greater | 0 | 0
Total | 85,998 | 87,302
Gross Unrealized Losses |  |
Less Than 12 Months | (4,449) | (1,087)
12 Months or Greater | 0 | 0
Total | (4,449) | (1,087)
U.S. agency |  |
Fair Value |  |
Less Than 12 Months | 6,893 | 10,969
12 Months or Greater | 0 | 0
Total | 6,893 | 10,969
Gross Unrealized Losses |  |
Less Than 12 Months | (251) | (140)
12 Months or Greater | 0 | 0
Total | (251) | (140)
Asset backed securities |  |
Fair Value |  |
Less Than 12 Months | 21,734 |
12 Months or Greater | 4,052 |
Total | 25,786 |
Gross Unrealized Losses |  |
Less Than 12 Months | (356) |
12 Months or Greater | (175) |
Total | (531) |
State, county & municipal securities |  |
Fair Value |  |
Less Than 12 Months | 142,665 | 180,551
12 Months or Greater | 14,430 | 5,970
Total | 157,095 | 186,521
Gross Unrealized Losses |  |
Less Than 12 Months | (13,806) | (3,131)
12 Months or Greater | (1,889) | (225)
Total | (15,695) | (3,356)
Corporate debt securities |  |
Fair Value |  |
Less Than 12 Months | 43,103 | 31,977
12 Months or Greater | 0 | 0
Total | 43,103 | 31,977
Gross Unrealized Losses |  |
Less Than 12 Months | (1,719) | (265)
12 Months or Greater | 0 | 0
Total | (1,719) | (265)
Mortgage-backed securities |  |
Fair Value |  |
Less Than 12 Months | 260,863 | 377,413
12 Months or Greater | 39,420 | 21,129
Total | 300,283 | 398,542
Gross Unrealized Losses |  |
Less Than 12 Months | (13,274) | (6,421)
12 Months or Greater | (4,293) | (640)
Total | $ (17,567) | $ (7,061)

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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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