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Loans Receivable Held for Investment, Troubled Debt Restructurings (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($) Borrower Loan	Sep. 30, 2019 Loan	Sep. 30, 2020 USD ($) Borrower Loan	Sep. 30, 2019 Loan	Dec. 31, 2019 USD ($)
Troubled Debt Restructurings [Abstract]
Number of borrowers who requested for loan modification | Borrower	0		0
Loans classified as troubled debt restructurings	$ 4,200		$ 4,200		$ 4,700
Specific reserves allocated to TDRs	148		$ 148		147
Timely payment period for return to accrual status			6 months
Commitments to lend additional amounts to customers with TDRs	$ 0		$ 0		0
Number of loans modified | Loan	0	0	0	0
Non-accrual Status [Member]
Troubled Debt Restructurings [Abstract]
Loans classified as troubled debt restructurings	$ 243		$ 243		406
Accrual Status [Member]
Troubled Debt Restructurings [Abstract]
Loans classified as troubled debt restructurings	$ 4,000		$ 4,000		$ 4,300

X

- Definition

Amount of allowance to cover probable credit losses on loans for which the terms have been modified in troubled debt restructurings.

+ References

No definition available.

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- Definition

Period of receipt of timely payments after which a financing receivable that has been modified in a troubled debt restructuring and is on non-accrual status can typically be returned to accrual status, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Number of borrowers who have requested for loan modifications.

+ References

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-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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- Definition

Amount of financing receivable modified as troubled debt restructuring.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-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

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=121585226&loc=d3e18845-111554

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- Definition

Amount of unfunded portion of contractual agreement to lend funds to borrower for financing receivable modified as troubled debt restructuring.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121585226&loc=d3e18794-111554

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