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Investment Securities - Securities With Unrealized Losses (Details) $ in Thousands | Sep. 30, 2020 USD ($)
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Debt Securities, Available-for-sale [Line Items] |
Available-for-sale, less than 12 months, estimated fair value | $ 416,380
Available-for-sale, less than 12 months, gross unrealized losses | (2,912)
Available-for-sale, 12 months or more, estimated fair value | 58,753
Available-for-sale, 12 months or more, gross unrealized losses | (929)
Available-for-sale, total, estimated fair value | 475,133
Available-for-sale, total, gross unrealized losses | (3,841)
U.S. Government agencies |
Debt Securities, Available-for-sale [Line Items] |
Available-for-sale, less than 12 months, estimated fair value | 213,014
Available-for-sale, less than 12 months, gross unrealized losses | (440)
Available-for-sale, 12 months or more, estimated fair value | 54,329
Available-for-sale, 12 months or more, gross unrealized losses | (922)
Available-for-sale, total, estimated fair value | 267,343
Available-for-sale, total, gross unrealized losses | (1,362)
Mortgage-backed securities |
Debt Securities, Available-for-sale [Line Items] |
Available-for-sale, less than 12 months, estimated fair value | 95,213
Available-for-sale, less than 12 months, gross unrealized losses | (433)
Available-for-sale, 12 months or more, estimated fair value | 4,038
Available-for-sale, 12 months or more, gross unrealized losses | (6)
Available-for-sale, total, estimated fair value | 99,251
Available-for-sale, total, gross unrealized losses | (439)
State and political subdivisions |
Debt Securities, Available-for-sale [Line Items] |
Available-for-sale, less than 12 months, estimated fair value | 108,153
Available-for-sale, less than 12 months, gross unrealized losses | (2,039)
Available-for-sale, 12 months or more, estimated fair value | 386
Available-for-sale, 12 months or more, gross unrealized losses | (1)
Available-for-sale, total, estimated fair value | 108,539
Available-for-sale, total, gross unrealized losses | $ (2,040)

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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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