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Investment Securities - Securities With Unrealized Losses (Details) $ in Thousands | Dec. 31, 2020 USD ($)
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Available-for-sale |
Available-for-sale debt securities, less than 12 months, estimated fair value | $ 502,386
Available-for-sale debt securities, less than 12 months, gross unrealized losses | (1,602)
Available-for-sale debt securities, 12 months or more, estimated fair value | 56,895
Available-for-sale debt securities, 12 months or more, gross unrealized losses | (882)
Available-for-sale debt securities, estimated fair value | 559,281
Available-for-sale debt securities, gross unrealized losses | (2,484)
U.S. Government agencies |
Available-for-sale |
Available-for-sale debt securities, less than 12 months, estimated fair value | 228,241
Available-for-sale debt securities, less than 12 months, gross unrealized losses | (432)
Available-for-sale debt securities, 12 months or more, estimated fair value | 52,853
Available-for-sale debt securities, 12 months or more, gross unrealized losses | (868)
Available-for-sale debt securities, estimated fair value | 281,094
Available-for-sale debt securities, gross unrealized losses | (1,300)
Mortgage-backed securities |
Available-for-sale |
Available-for-sale debt securities, less than 12 months, estimated fair value | 264,843
Available-for-sale debt securities, less than 12 months, gross unrealized losses | (1,082)
Available-for-sale debt securities, 12 months or more, estimated fair value | 3,703
Available-for-sale debt securities, 12 months or more, gross unrealized losses | (12)
Available-for-sale debt securities, estimated fair value | 268,546
Available-for-sale debt securities, gross unrealized losses | (1,094)
State and political subdivisions |
Available-for-sale |
Available-for-sale debt securities, less than 12 months, estimated fair value | 9,302
Available-for-sale debt securities, less than 12 months, gross unrealized losses | (88)
Available-for-sale debt securities, 12 months or more, estimated fair value | 339
Available-for-sale debt securities, 12 months or more, gross unrealized losses | (2)
Available-for-sale debt securities, estimated fair value | 9,641
Available-for-sale debt securities, gross unrealized losses | $ (90)

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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=121582814&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=121645371&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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- Definition Amount of accumulated unrealized loss on 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 12 months or longer, 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 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27337-111563 Reference 2: 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=121582814&loc=SL82922890-210455 + Details
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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 less 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 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27337-111563 Reference 2: 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=121582814&loc=SL82922890-210455 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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