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Derivative Instruments and Hedging Activities (Effect of Fair Value Hedges on Consolidated Statements of Income) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Mar. 31, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Swap |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Gain (Loss) Recognized in Consolidated Statements of Income |  |  | $ 2,500 |  |
Derivatives not designated as hedging instruments |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Gain (Loss) Recognized in Consolidated Statements of Income | $ (212) | $ 2,359 |  | $ (224) | $ 7,237
Derivatives not designated as hedging instruments | Interest rate contracts | Capital markets income |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Gain (Loss) Recognized in Consolidated Statements of Income | 164 | 176 |  | 474 | 225
Derivatives not designated as hedging instruments | Other contracts | Capital markets income |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Gain (Loss) Recognized in Consolidated Statements of Income | 90 | 47 |  | 272 | (286)
Derivatives not designated as hedging instruments | Mortgage derivatives | Mortgage derivatives - interest rate lock commitments | Mortgage banking income |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Gain (Loss) Recognized in Consolidated Statements of Income | (1,388) | 2,532 |  | (3,160) | 8,922
Derivatives not designated as hedging instruments | Mortgage derivatives | Mortgage derivatives - forward commitments to sell fixed-rate mortgage loans | Mortgage banking income |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Gain (Loss) Recognized in Consolidated Statements of Income | $ 922 | $ (396) |  | $ 2,190 | $ (1,624)

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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=125515794&loc=SL5618551-113959 + Details
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