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Fair Values - Schedule of Fair Value Measurement (Details) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($) land_asset
Assets and liabilities recorded at fair value
Derivative liabilities	$ 21,900		$ 8,700
Impairment of real estate	3,000	$ 3,300
Mandarin Asset
Assets and liabilities recorded at fair value
Impairment of real estate	3,000
Land and Development Asset
Assets and liabilities recorded at fair value
Impairment of real estate	1,500
Recurring Basis | Fair Value
Assets and liabilities recorded at fair value
Derivative assets			114
Derivative liabilities	21,852		8,680
Available-for-sale securities	24,611		23,896
Recurring Basis | Quoted market prices in active markets (Level 1)
Assets and liabilities recorded at fair value
Derivative assets			0
Derivative liabilities	0		0
Available-for-sale securities	0		0
Recurring Basis | Significant other observable inputs (Level 2)
Assets and liabilities recorded at fair value
Derivative assets			114
Derivative liabilities	21,852		8,680
Available-for-sale securities	0		0
Recurring Basis | Significant unobservable inputs (Level 3)
Assets and liabilities recorded at fair value
Derivative assets			0
Derivative liabilities	0		0
Available-for-sale securities	24,611		23,896
Non-recurring Basis
Assets and liabilities recorded at fair value
Aggregate impairments			$ 5,300
Number of land and development assets impaired | land_asset			2
Non-recurring Basis | Fair Value
Assets and liabilities recorded at fair value
Impaired real estate	4,642
Impaired land and development	6,628		$ 40,000
Non-recurring Basis | Quoted market prices in active markets (Level 1)
Assets and liabilities recorded at fair value
Impaired real estate	0
Impaired land and development	0		0
Non-recurring Basis | Significant other observable inputs (Level 2)
Assets and liabilities recorded at fair value
Impaired real estate	0
Impaired land and development	0		0
Non-recurring Basis | Significant unobservable inputs (Level 3)
Assets and liabilities recorded at fair value
Impaired real estate	4,642
Impaired land and development	$ 6,628		$ 40,000

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