Investment in Mortgage Notes and Notes Receivable (Details) | 3 Months Ended | | |
Mar. 31, 2021USD ($) | Mar. 31, 2020USD ($) | Jan. 01, 2021USD ($) | Dec. 31, 2020USD ($) |
Financing Receivable, Allowance for Credit Loss [Line Items] | | | | |
Financing Receivable, Allowance for Credit Loss | $ 30,096,000 | $ 2,163,000 | $ 0 | $ 32,858,000 |
Provision for Loan, Lease, and Other Losses | (2,762,000) | | | |
Financing Receivable, Allowance for Credit Loss, Writeoff | 0 | | | |
Financing Receivable, Allowance for Credit Loss, Recovery | 0 | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Face Amount of Mortgages | 365,916,000 | | | |
Mortgage Loans on Real Estate, Commercial and Consumer, Net | 364,969,000 | | | 365,628,000 |
Mortgage Note and Notes Receivable Commitments | 23,900,000 | | | |
Notes Receivable | | | | 7,300,000 |
Proceeds from Sale and Collection of Mortgage Notes Receivable | $ 5,299,000 | $ 94,000 | | |
Number of Notes Receivable | 1 | | | |
Note, 8.0%, due May 2, 2024 [Member] | | | | |
Financing Receivable, Allowance for Credit Loss [Line Items] | | | | |
Provision for Loan, Lease, and Other Losses | $ 25,500,000 | | | |
Number of Notes Receivable | 1 | | | |
Note Receivable, Face Amount | $ 17,000,000 | | | |
Note Receivable, Unfunded Commitment | 8,500,000 | | | |
Mortgage Receivable [Member] | | | | |
Financing Receivable, Allowance for Credit Loss [Line Items] | | | | |
Financing Receivable, Allowance for Credit Loss | 4,316,000 | | | 7,000,000 |
Provision for Loan, Lease, and Other Losses | (2,684,000) | | | |
Financing Receivable, Allowance for Credit Loss, Writeoff | 0 | | | |
Financing Receivable, Allowance for Credit Loss, Recovery | 0 | | | |
Mortgage Note and Notes Receivable Commitments | $ 15,434,000 | | | |
Mortgage Receivable [Member] | Mortgage Note, 9.02%, Prepaid in Full | Private School | | | | |
Financing Receivable, Allowance for Credit Loss [Line Items] | | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Interest Rate | 9.02% | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Face Amount of Mortgages | $ 0 | | | |
Mortgage Loans on Real Estate, Commercial and Consumer, Net | 0 | | | 5,278,000 |
Mortgage Note and Notes Receivable Commitments | 0 | | | |
Proceeds from Sale and Collection of Mortgage Notes Receivable | 5,100,000 | | | |
Prepaymentfee | $ 0 | | | |
Mortgage Receivable [Member] | Mortgage Note, 7.75%, due June 30, 2025 [Member] | Attraction Properties [Member] | | | | |
Financing Receivable, Allowance for Credit Loss [Line Items] | | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Interest Rate | 7.75% | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Face Amount of Mortgages | $ 28,178,000 | | | |
Mortgage Loans on Real Estate, Commercial and Consumer, Net | 27,372,000 | | | 27,045,000 |
Mortgage Note and Notes Receivable Commitments | $ 0 | | | |
Mortgage Receivable [Member] | Mortgage Note, 7.85%, due January 3, 2027 [Member] | Fitness & Wellness Properties [Member] | | | | |
Financing Receivable, Allowance for Credit Loss [Line Items] | | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Interest Rate | 7.85% | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Face Amount of Mortgages | $ 10,905,000 | | | |
Mortgage Loans on Real Estate, Commercial and Consumer, Net | 11,252,000 | | | 11,225,000 |
Mortgage Note and Notes Receivable Commitments | $ 0 | | | |
Mortgage Receivable [Member] | Mortgage Note, 7.55%, due July 31, 2029 [Member] | Fitness & Wellness Properties [Member] | | | | |
Financing Receivable, Allowance for Credit Loss [Line Items] | | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Interest Rate | 7.55% | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Face Amount of Mortgages | $ 9,090,000 | | | |
Mortgage Loans on Real Estate, Commercial and Consumer, Net | 9,370,000 | | | 9,355,000 |
Mortgage Note and Notes Receivable Commitments | $ 0 | | | |
Mortgage Receivable [Member] | Mortgage Note, 8.25%, December 31, 2029 [Member] | Ski Properties [Member] | | | | |
Financing Receivable, Allowance for Credit Loss [Line Items] | | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Interest Rate | 8.24% | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Face Amount of Mortgages | $ 42,645,000 | | | |
Mortgage Loans on Real Estate, Commercial and Consumer, Net | 42,515,000 | | | 40,680,000 |
Mortgage Note and Notes Receivable Commitments | $ 14,355,000 | | | |
Mortgage Receivable [Member] | Mortgage Note, 7.85%, due June 30, 2030 [Member] | Fitness & Wellness Properties [Member] | | | | |
Financing Receivable, Allowance for Credit Loss [Line Items] | | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Interest Rate | 7.85% | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Face Amount of Mortgages | $ 9,839,000 | | | |
Mortgage Loans on Real Estate, Commercial and Consumer, Net | 10,082,000 | | | 8,630,000 |
Mortgage Note and Notes Receivable Commitments | $ 1,079,000 | | | |
Mortgage Receivable [Member] | Mortgage Note, 6.99%, due September 30, 2031 [Member] | Experiential Lodging Properties [Member] | | | | |
Financing Receivable, Allowance for Credit Loss [Line Items] | | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Interest Rate | 7.01% | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Face Amount of Mortgages | $ 71,223,000 | | | |
Mortgage Loans on Real Estate, Commercial and Consumer, Net | 69,475,000 | | | 67,235,000 |
Mortgage Note and Notes Receivable Commitments | $ 0 | | | |
Mortgage Receivable [Member] | Mortgage Note, 11.31%, due June 1, 2033 [Member] | Eat & Play Properties [Member] | | | | |
Financing Receivable, Allowance for Credit Loss [Line Items] | | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Interest Rate | 11.31% | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Face Amount of Mortgages | $ 11,150,000 | | | |
Mortgage Loans on Real Estate, Commercial and Consumer, Net | 11,357,000 | | | 11,929,000 |
Mortgage Note and Notes Receivable Commitments | $ 0 | | | |
Mortgage Receivable [Member] | Mortgage Note, 11.78%, due December 1, 2034 [Member] | Ski Properties [Member] | | | | |
Financing Receivable, Allowance for Credit Loss [Line Items] | | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Interest Rate | 11.78% | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Face Amount of Mortgages | $ 51,050,000 | | | |
Mortgage Loans on Real Estate, Commercial and Consumer, Net | 51,037,000 | | | 51,031,000 |
Mortgage Note and Notes Receivable Commitments | $ 0 | | | |
Mortgage Receivable [Member] | Mortgage Note, 10.91%, due December 1, 2034 [Member] | Ski Properties [Member] | | | | |
Financing Receivable, Allowance for Credit Loss [Line Items] | | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Interest Rate | 10.91% | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Face Amount of Mortgages | $ 37,562,000 | | | |
Mortgage Loans on Real Estate, Commercial and Consumer, Net | 37,459,000 | | | 37,413,000 |
Mortgage Note and Notes Receivable Commitments | $ 0 | | | |
Mortgage Receivable [Member] | Mortgage Note, 11.38%, due December 1, 2034 [Member] | Ski Properties [Member] | | | | |
Financing Receivable, Allowance for Credit Loss [Line Items] | | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Interest Rate | 11.38% | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Face Amount of Mortgages | $ 4,550,000 | | | |
Mortgage Loans on Real Estate, Commercial and Consumer, Net | 4,433,000 | | | 4,396,000 |
Mortgage Note and Notes Receivable Commitments | $ 0 | | | |
Mortgage Receivable [Member] | Mortgage Note, 8.72%, due January 5, 2036 [Member] | Ski Properties [Member] | | | | |
Financing Receivable, Allowance for Credit Loss [Line Items] | | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Interest Rate | 8.72% | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Face Amount of Mortgages | $ 21,000,000 | | | |
Mortgage Loans on Real Estate, Commercial and Consumer, Net | 21,000,000 | | | 21,000,000 |
Mortgage Note and Notes Receivable Commitments | $ 0 | | | |
Mortgage Receivable [Member] | Mortgage Note, due May 31, 2036 [Member] | Eat & Play Properties [Member] | | | | |
Financing Receivable, Allowance for Credit Loss [Line Items] | | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Interest Rate | 10.25% | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Face Amount of Mortgages | $ 17,505,000 | | | |
Mortgage Loans on Real Estate, Commercial and Consumer, Net | 17,796,000 | | | 18,289,000 |
Mortgage Note and Notes Receivable Commitments | $ 0 | | | |
Mortgage Receivable [Member] | Mortgage Note, 9.75% due August 1, 2036 [Member] | Eat & Play Properties [Member] | | | | |
Financing Receivable, Allowance for Credit Loss [Line Items] | | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Interest Rate | 9.75% | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Face Amount of Mortgages | $ 18,068,000 | | | |
Mortgage Loans on Real Estate, Commercial and Consumer, Net | 18,348,000 | | | 18,830,000 |
Mortgage Note and Notes Receivable Commitments | $ 0 | | | |
Mortgage Receivable [Member] | Mortgage Note, 7.85% due January 31, 2038 [Member] | Fitness & Wellness Properties [Member] | | | | |
Financing Receivable, Allowance for Credit Loss [Line Items] | | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Interest Rate | 7.85% | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Face Amount of Mortgages | $ 10,292,000 | | | |
Mortgage Loans on Real Estate, Commercial and Consumer, Net | 10,490,000 | | | 10,408,000 |
Mortgage Note and Notes Receivable Commitments | $ 0 | | | |
Mortgage Receivable [Member] | Mortgage Note, 7.87%, due May 9, 2039 [Member] | early childhood education center [Member] | | | | |
Financing Receivable, Allowance for Credit Loss [Line Items] | | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Interest Rate | 7.87% | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Face Amount of Mortgages | $ 4,200,000 | | | |
Mortgage Loans on Real Estate, Commercial and Consumer, Net | 4,357,000 | | | 4,348,000 |
Mortgage Note and Notes Receivable Commitments | $ 0 | | | |
Mortgage Receivable [Member] | Mortgage Note, 8.125%, due June 17, 2039 [Member] | Eat & Play Properties [Member] | | | | |
Financing Receivable, Allowance for Credit Loss [Line Items] | | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Interest Rate | 8.13% | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Face Amount of Mortgages | $ 14,700,000 | | | |
Mortgage Loans on Real Estate, Commercial and Consumer, Net | 14,799,000 | | | 14,799,000 |
Mortgage Note and Notes Receivable Commitments | $ 0 | | | |
Mortgage Receivable [Member] | Mortgage Note, 8.42%, due October 31, 2019 [Member] | early childhood education center [Member] | | | | |
Financing Receivable, Allowance for Credit Loss [Line Items] | | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Interest Rate | 8.42% | | | |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Face Amount of Mortgages | $ 3,959,000 | | | |
Mortgage Loans on Real Estate, Commercial and Consumer, Net | 3,827,000 | | | 3,737,000 |
Mortgage Note and Notes Receivable Commitments | 0 | | | |
Unfunded Loan Commitment [Member] | | | | |
Financing Receivable, Allowance for Credit Loss [Line Items] | | | | |
Financing Receivable, Allowance for Credit Loss | 106,000 | | | 138,000 |
Provision for Loan, Lease, and Other Losses | (32,000) | | | |
Financing Receivable, Allowance for Credit Loss, Writeoff | 0 | | | |
Financing Receivable, Allowance for Credit Loss, Recovery | 0 | | | |
Notes Receivable [Member] | | | | |
Financing Receivable, Allowance for Credit Loss [Line Items] | | | | |
Financing Receivable, Allowance for Credit Loss | 17,187,000 | | | 12,854,000 |
Provision for Loan, Lease, and Other Losses | 4,333,000 | | | |
Financing Receivable, Allowance for Credit Loss, Writeoff | 0 | | | |
Financing Receivable, Allowance for Credit Loss, Recovery | 0 | | | |
Note Receivable Unfunded Loan Commitment | | | | |
Financing Receivable, Allowance for Credit Loss [Line Items] | | | | |
Financing Receivable, Allowance for Credit Loss | 8,487,000 | | | $ 12,866,000 |
Provision for Loan, Lease, and Other Losses | (4,379,000) | | | |
Financing Receivable, Allowance for Credit Loss, Writeoff | 0 | | | |
Financing Receivable, Allowance for Credit Loss, Recovery | $ 0 | | | |