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Fair Values (Schedule of Fair Value Measurement) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2020	Jun. 30, 2021
Assets and liabilities recorded at fair value
Derivative liabilities		$ 19,000	$ 13,500
Loan receivable held for sale		0	62,525
Other investments	[1]	1,176,560	1,275,954
Fair Value
Assets and liabilities recorded at fair value
Aggregate impairments		1,300
Recurring Basis | Fair Value, Inputs, Level 1
Assets and liabilities recorded at fair value
Derivative liabilities		0	0
Available-for-sale securities		0	0
Recurring Basis | Fair Value, Inputs, Level 2
Assets and liabilities recorded at fair value
Derivative liabilities		18,926	13,481
Available-for-sale securities		0	0
Recurring Basis | Fair Value, Inputs, Level 3
Assets and liabilities recorded at fair value
Derivative liabilities		0	0
Available-for-sale securities		25,274	28,074
Recurring Basis | Fair Value
Assets and liabilities recorded at fair value
Derivative liabilities		18,926	13,481
Available-for-sale securities		25,274	28,074
Non-recurring Basis | Fair Value, Inputs, Level 1
Assets and liabilities recorded at fair value
Other investments			0
Impaired land and development		0
Non-recurring Basis | Fair Value, Inputs, Level 2
Assets and liabilities recorded at fair value
Other investments			75,402
Impaired land and development		0
Non-recurring Basis | Fair Value, Inputs, Level 3
Assets and liabilities recorded at fair value
Other investments			0
Impaired land and development		6,078
Non-recurring Basis | Fair Value
Assets and liabilities recorded at fair value
Other investments			$ 75,402
Impaired land and development		$ 6,078
[1] Refer to Note 2 for details on the Company’s consolidated variable interest entities (“VIEs”).

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