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Loan Servicing - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Loan Sales And Mortgage Servicing Rights [Line Items]
Servicing assets	$ 17,083	$ 17,370
Servicing fees net of servicing asset amortization	3,383	850	$ 722
Mortgage Loans
Loan Sales And Mortgage Servicing Rights [Line Items]
Servicing assets	$ 15,100	$ 15,300
Mortgage Loans | Fair Value Discount Rate
Loan Sales And Mortgage Servicing Rights [Line Items]
Fair value of servicing assets percentage	10.82	10.59
Mortgage Loans | Fair Value Prepayment Rate | Minimum
Loan Sales And Mortgage Servicing Rights [Line Items]
Fair value of servicing assets percentage	7.27	8.26
Mortgage Loans | Fair Value Prepayment Rate | Maximum
Loan Sales And Mortgage Servicing Rights [Line Items]
Fair value of servicing assets percentage	20.15	16.82
Mortgage Loans | Fair Value Weighted Average Default Rate
Loan Sales And Mortgage Servicing Rights [Line Items]
Fair value of servicing assets percentage	0.11	0.20
SBA Loans
Loan Sales And Mortgage Servicing Rights [Line Items]
Servicing assets	$ 5,600	$ 6,100
SBA Loans | Fair Value Discount Rate
Loan Sales And Mortgage Servicing Rights [Line Items]
Fair value of servicing assets percentage	8.50	8.50
SBA Loans | Fair Value Prepayment Rate | Minimum
Loan Sales And Mortgage Servicing Rights [Line Items]
Fair value of servicing assets percentage	12.50	11.43
SBA Loans | Fair Value Prepayment Rate | Maximum
Loan Sales And Mortgage Servicing Rights [Line Items]
Fair value of servicing assets percentage	14.66	12.11
SBA Loans | Fair Value Weighted Average Default Rate
Loan Sales And Mortgage Servicing Rights [Line Items]
Fair value of servicing assets percentage	0.43	0.52

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Loan sales and mortgage servicing rights.

+ References

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- Definition

Loan servicing fees, net of amortization.

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- Definition

Aggregate amount of servicing assets that are subsequently measured at fair value and servicing assets that are subsequently measured using the amortization method.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745

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- Definition

Value of input used to measure servicing asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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