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Fair Values - (Carrying Value and Fair Value of Financial Instruments) (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Jan. 01, 2021 | Dec. 31, 2020 | Sep. 30, 2020
--- | --- | --- | --- | ---
Carrying Value |  |  |  |
Book and estimated fair values of financial instruments |  |  |  |
Net investment in leases | $ 477 |  | $ 429 |
Loans receivable and other lending investments | 406 |  | 732 |
Cash and cash equivalents | 299 |  | 99 |
Restricted cash | 56 |  | 52 |
Loan participations payable, net | 0 |  | 43 |
Debt obligations, net | 3,283 |  | 3,287 |
Fair Value |  |  |  |
Book and estimated fair values of financial instruments |  |  |  |
Net investment in leases | 497 |  | 431 |
Loans receivable and other lending investments | 436 |  | 772 |
Cash and cash equivalents | 299 |  | 99 |
Restricted cash | 56 |  | 52 |
Loan participations payable, net | 0 |  | 43 |
Debt obligations, net | $ 3,643 |  | 3,414 |
3.125% Senior Convertible Notes |  |  |  |
Book and estimated fair values of financial instruments |  |  |  |
Stated interest rate | 3.125% |  |  | 3.125%
3.125% Senior Convertible Notes | Unsecured notes |  |  |  |
Book and estimated fair values of financial instruments |  |  |  |
Debt obligations, net | $ 527,200 |  | $ 338,800 |
Stated interest rate | 3.125% | 3.125% | 3.125% | 3.125%

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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
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- Definition Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -URI http://asc.fasb.org/subtopic&trid=2196772 + Details
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