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Borrowings - Long-term Borrowings (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Long-term borrowings
Long-term borrowings	$ 119,529	$ 119,529
Non-recourse revolving bank line of credit
Long-term borrowings
Long-term borrowings	$ 75,030
Non-recourse revolving bank line of credit | London Interbank Offered Rate (LIBOR)
Long-term borrowings
Variable rate basis	one-month LIBOR
Minimum | Non-recourse revolving bank line of credit | London Interbank Offered Rate (LIBOR)
Long-term borrowings
Variable rate, basis spread (as a percent)	2.00%
Fixed Rate Hybrid Advances | FHLB Advances
Long-term borrowings
Long-term borrowings	$ 37,000
Fixed Rate Hybrid Advances | FHLB Advances
Long-term borrowings
Long-term borrowings	$ 7,500

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- Definition

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Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
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-Name Accounting Standards Codification
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-SubTopic 210
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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