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Derivative Financial Instruments Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Derivative [Line Items]
Foreign currency open position	$ 500
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	3,400
Derivative, Net Liability Position, Aggregate Fair Value	492
Collateral Already Posted, Aggregate Fair Value	143,100
Derivative, Net Liability Position, Termination Value	492
Mortgage Loans Held For Sale [Member]
Derivative [Line Items]
Gain (loss) in fair values of mortgage loans held for sale	$ (2,900)	$ 733

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Derivative, Net Liability Position, Termination Value

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TotalopenforeigncurrencypositionperCorporatepolicy.

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- Definition

The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (c)
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The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4H
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The aggregate fair value amounts of derivative instruments that contain credit-risk-related contingent features that are in a net liability position at the end of the reporting period. For nonderivative instruments that are designated and qualify as hedging instruments, the fair value amounts are the carrying value of the nonderivative hedging instrument, including the adjustment for the foreign currency transaction gain (loss) on that instrument.

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For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings.

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