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Fair Value - Assets and Liabilities Recorded at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019 | Mar. 31, 2019
--- | --- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | $ 312,928 | $ 360,520 | $ 325,276
U.S. Government-sponsored agencies |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 7,552 | 7,398 | 5,016
Mortgage-backed securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 285,152 | 326,617 | 315,423
State and political subdivisions |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 20,224 | 26,505 | 4,837
Fair Value, Measurements, Recurring | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 0 | 0 | 0
Derivative assets | 0 |  |
Total assets | 0 | 0 | 0
Derivative liabilities | 0 | 0 | 0
Fair Value, Measurements, Recurring | Level 1 | Interest rate swap agreements |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets |  | 0 | 0
Derivative liabilities | 0 | 0 | 0
Fair Value, Measurements, Recurring | Level 1 | Customer loan interest swap agreements |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets | 0 | 0 |
Fair Value, Measurements, Recurring | Level 1 | U.S. Government-sponsored agencies |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 0 | 0 | 0
Fair Value, Measurements, Recurring | Level 1 | Mortgage-backed securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 0 | 0 | 0
Fair Value, Measurements, Recurring | Level 1 | State and political subdivisions |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 0 | 0 | 0
Fair Value, Measurements, Recurring | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 312,928 | 360,520 | 325,276
Derivative assets | 3,280 | 1,767 |
Total assets | 316,208 | 362,287 | 326,709
Derivative liabilities | 9,322 | 1,644 | 201
Fair Value, Measurements, Recurring | Level 2 | Interest rate swap agreements |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets |  | 562 | 1,433
Derivative liabilities | 9,322 | 439 | 201
Fair Value, Measurements, Recurring | Level 2 | Customer loan interest swap agreements |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets | 3,280 | 1,205 |
Derivative liabilities |  | 1,205 |
Fair Value, Measurements, Recurring | Level 2 | U.S. Government-sponsored agencies |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 7,552 | 7,398 | 5,016
Fair Value, Measurements, Recurring | Level 2 | Mortgage-backed securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 285,152 | 326,617 | 315,423
Fair Value, Measurements, Recurring | Level 2 | State and political subdivisions |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 20,224 | 26,505 | 4,837
Fair Value, Measurements, Recurring | Level 3 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 0 | 0 | 0
Derivative assets | 0 |  |
Total assets | 0 | 0 | 0
Derivative liabilities | 0 | 0 | 0
Fair Value, Measurements, Recurring | Level 3 | Interest rate swap agreements |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets |  | 0 | 0
Derivative liabilities | 0 | 0 | 0
Fair Value, Measurements, Recurring | Level 3 | Customer loan interest swap agreements |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets | 0 |  |
Fair Value, Measurements, Recurring | Level 3 | U.S. Government-sponsored agencies |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 0 | 0 | 0
Fair Value, Measurements, Recurring | Level 3 | Mortgage-backed securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 0 | 0 | 0
Fair Value, Measurements, Recurring | Level 3 | State and political subdivisions |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 0 | 0 | 0
Fair Value, Measurements, Recurring | Total Fair Value |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 312,928 | 360,520 | 325,276
Derivative assets | 3,280 | 1,767 |
Total assets | 316,208 | 362,287 | 326,709
Derivative liabilities | 9,322 | 1,644 | 201
Fair Value, Measurements, Recurring | Total Fair Value | Interest rate swap agreements |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets |  | 562 | 1,433
Derivative liabilities | 9,322 | 439 | 201
Fair Value, Measurements, Recurring | Total Fair Value | Customer loan interest swap agreements |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets | 3,280 | 1,205 |
Derivative liabilities |  | 1,205 |
Fair Value, Measurements, Recurring | Total Fair Value | U.S. Government-sponsored agencies |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 7,552 | 7,398 | 5,016
Fair Value, Measurements, Recurring | Total Fair Value | Mortgage-backed securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 285,152 | 326,617 | 315,423
Fair Value, Measurements, Recurring | Total Fair Value | State and political subdivisions |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | $ 20,224 | $ 26,505 | $ 4,837

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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). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118942338&loc=SL82898722-210454 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118954083&loc=d3e26610-111562 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563 + Details
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