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Fair Value Measurement - Loan Servicing Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Servicing Asset at Fair Value, Amount [Roll Forward]
Fair value, beginning balance	$ 6,831
Fair value, ending balance	8,734
Servicing Liability at Fair Value, Amount [Roll Forward]
Fair value, beginning balance	8,254
Fair value, ending balance	10,853
Fair Value, Inputs, Level 3
Servicing Asset at Fair Value, Amount [Roll Forward]
Fair value, beginning balance	6,831
Fair value, ending balance	8,734
Servicing Liability at Fair Value, Amount [Roll Forward]
Fair value, beginning balance	8,254
Fair value, ending balance	10,853
Fair Value, Inputs, Level 3 | Loan Servicing Liabilities
Servicing Liability at Fair Value, Amount [Roll Forward]
Fair value, beginning balance	8,254	$ 5,140
Sale of loans	3,519	1,246
Changes in fair value recorded in earnings	(920)	(480)
Fair value, ending balance	10,853	5,906
Loan Servicing Assets | Fair Value, Inputs, Level 3
Servicing Asset at Fair Value, Amount [Roll Forward]
Fair value, beginning balance	6,831	4,725
Sale of loans	3,452	2,705
Changes in fair value recorded in earnings	(1,549)	(808)
Fair value, ending balance	$ 8,734	$ 6,622

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Servicing Asset At Fair Value, Gain (Loss) Included In Earnings

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- Definition

The value of new servicing assets, subsequently measured at fair value, acquired or created during the current period through purchases or from transfers of financial assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 3
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=116651436&loc=d3e122625-111746

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Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 45
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745

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-Publisher FASB
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The value of new servicing liabilities, that are subsequently measured at fair value, acquired or created during the current period through assumptions of servicing obligations and servicing obligations that result from transfers of financial assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 3
-Subparagraph (a)(2)
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Fair value of a liability representing servicing arrangements under which the estimated future revenue from contractually specified servicing fees, late charges, and other ancillary revenues are not expected to adequately compensate the servicer.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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-Topic 860
-SubTopic 50
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-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122492-111745

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