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Derivatives - Fair Value Hedges on Income Statement (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Reported interest income on tax-exempt securities | $ 416 | $ 411 | $ 699 | $ 836
Interest Rate Swap [Member] |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Interest rate swap agreements - securities: | 205 | 1,348 | 3,644 | 2,237
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Interest income on tax-exempt securities | 580 | 449 | 1,020 | 906
Effects of fair value hedge relationships | (164) | (38) | (321) | (70)
Reported interest income on tax-exempt securities | 416 | 411 | 699 | 836
Interest rate swap agreements - securities: | $ (205) | $ (1,348) | $ (3,644) | $ (2,237)

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- Definition Interest Income, Securities, Operating, Tax Exempt, Gross + References No definition available. + Details
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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959 + Details
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- Definition Total amount of gain (loss) derived from fair value hedges recognized in earnings in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959 + Details
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