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Fair Values (Schedule of Fair Value Measurement) (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Mar. 31, 2021
Assets and liabilities recorded at fair value |  |  |
Derivative liabilities |  | $ 19,000 | $ 14,200
Loan receivable held for sale (refer to Note 7) | [1] | 0 | 16,086
Other investments | [1] | 1,176,560 | 1,237,295
Recurring Basis | Fair Value |  |  |
Assets and liabilities recorded at fair value |  |  |
Derivative liabilities |  | 18,926 | 14,178
Available-for-sale securities |  | 25,274 | 24,043
Loan receivable held for sale (refer to Note 7) |  |  | 16,086
Recurring Basis | Quoted market prices in active markets (Level 1) |  |  |
Assets and liabilities recorded at fair value |  |  |
Derivative liabilities |  | 0 | 0
Available-for-sale securities |  | 0 | 0
Loan receivable held for sale (refer to Note 7) |  |  | 0
Recurring Basis | Significant other observable inputs (Level 2) |  |  |
Assets and liabilities recorded at fair value |  |  |
Derivative liabilities |  | 18,926 | 14,178
Available-for-sale securities |  | 0 | 0
Loan receivable held for sale (refer to Note 7) |  |  | 0
Recurring Basis | Significant unobservable inputs (Level 3) |  |  |
Assets and liabilities recorded at fair value |  |  |
Derivative liabilities |  | 0 | 0
Available-for-sale securities |  | 25,274 | 24,043
Loan receivable held for sale (refer to Note 7) |  |  | 16,086
Non-recurring Basis |  |  |
Assets and liabilities recorded at fair value |  |  |
Aggregate impairments |  | 1,300 |
Non-recurring Basis | Fair Value |  |  |
Assets and liabilities recorded at fair value |  |  |
Other investments |  |  | 75,402
Impaired land and development |  | 6,078 |
Non-recurring Basis | Quoted market prices in active markets (Level 1) |  |  |
Assets and liabilities recorded at fair value |  |  |
Other investments |  |  | 0
Impaired land and development |  | 0 |
Non-recurring Basis | Significant other observable inputs (Level 2) |  |  |
Assets and liabilities recorded at fair value |  |  |
Other investments |  |  | 75,402
Impaired land and development |  | 0 |
Non-recurring Basis | Significant unobservable inputs (Level 3) |  |  |
Assets and liabilities recorded at fair value |  |  |
Other investments |  |  | $ 0
Impaired land and development |  | $ 6,078 |
[1] | (1)Refer to Note 2 for details on the Company's consolidated variable interest entities ("VIEs").

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