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Debt Obligations, net - Collateral Assets (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019 | May 31, 2019
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |
Real estate, net | $ 1,501,089 | $ 1,527,219 |
Net investment in leases ($10,403 of allowances as of March 31, 2020) | 409,976 | 418,915 | $ 424,100
Land and development, net | 514,064 | 580,545 |
Loans receivable and other lending investments, net ($33,264 and $28,634 of allowances as of March 31, 2020 and December 31, 2019, respectively) | 850,835 | 827,861 |
Other investments | 1,029,552 | 907,875 |
Cash and other assets | 882,674 | 814,044 |
Total assets | 5,222,581 | 5,085,109 |
Carrying amount of assets held by entities pledged as collateral | 428,500 |  |
Net investment in leases, allowances | 10,403 |  |
General allowance for loan losses | 33,264 | 28,634 |
Loan Participations |  |  |
Debt Instrument [Line Items] |  |  |
Loans receivable and other lending investments, net ($33,264 and $28,634 of allowances as of March 31, 2020 and December 31, 2019, respectively) | 37,800 | 35,600 |
Collectively Evaluated for Impairment |  |  |
Debt Instrument [Line Items] |  |  |
General allowance for loan losses | 11,600 | 6,900 |
Collateral Assets |  |  |
Debt Instrument [Line Items] |  |  |
Real estate, net | 1,392,658 | 1,409,585 |
Real estate available and held for sale | 0 | 0 |
Net investment in leases ($10,403 of allowances as of March 31, 2020) | 420,380 | 418,915 |
Land and development, net | 0 | 0 |
Loans receivable and other lending investments, net ($33,264 and $28,634 of allowances as of March 31, 2020 and December 31, 2019, respectively) | 234,612 | 233,104 |
Other investments | 0 | 0 |
Cash and other assets | 0 | 0 |
Total assets | 2,047,650 | 2,061,604 |
Non-Collateral Assets |  |  |
Debt Instrument [Line Items] |  |  |
Real estate, net | 108,431 | 117,634 |
Real estate available and held for sale | 34,391 | 8,650 |
Net investment in leases ($10,403 of allowances as of March 31, 2020) | 0 | 0 |
Land and development, net | 514,064 | 580,545 |
Loans receivable and other lending investments, net ($33,264 and $28,634 of allowances as of March 31, 2020 and December 31, 2019, respectively) | 590,019 | 566,050 |
Other investments | 1,029,552 | 907,875 |
Cash and other assets | 882,674 | 814,044 |
Total assets | $ 3,159,131 | $ 2,994,798 |

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