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Loans and Allowance for Credit Losses - TDR Narrative (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($) loan	Mar. 31, 2021 USD ($)	Mar. 31, 2021 USD ($) contract	Mar. 31, 2020 USD ($) loan	Mar. 31, 2020 USD ($)	Mar. 31, 2020 USD ($) contract	Dec. 31, 2020 USD ($)
Loans and Leases Receivable Disclosure [Line Items]
Number of TDR loans | contract			8			13
Troubled debt restructuring, amount		$ 16,771			$ 20,379
Number of loans - restructured accruing	1		5	1		11
Number of loans paydowns | loan	0			0
Restructured accruing		10,328			17,872
Number of contracts modified in TDR | loan	0			4
TDR premodification					1,300
Non-Performing Loans
Loans and Leases Receivable Disclosure [Line Items]
Number of loans subsequent defaults reclassified to non-performing | loan	1,000			0
Troubled debt restructuring	$ 101	101	$ 101	$ 0	$ 0	$ 0
Performing Financial Instruments
Loans and Leases Receivable Disclosure [Line Items]
Number of TDR loans | contract			5
Troubled debt restructuring, amount		10,300
Troubled debt restructuring	$ 10,300	$ 10,300	$ 10,300				$ 10,500

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Number of financing receivables that have been modified by troubled debt restructurings.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
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