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Fair Values (Schedule of Fair Value Measurement) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Assets and liabilities recorded at fair value
Loan receivable held for sale	$ 43,215
Other investments	1,297,281	$ 1,097,562
Impairment of real estate - Held for sale		3,100
Impairment of real estate	600	3,100	$ 4,500
Recurring Basis | Fair Value, Inputs, Level 1
Assets and liabilities recorded at fair value
Derivative assets		0
Derivative liabilities	0
Available-for-sale securities	0	0
Recurring Basis | Fair Value, Inputs, Level 2
Assets and liabilities recorded at fair value
Derivative assets		18,926
Derivative liabilities	8,395
Available-for-sale securities	0	0
Recurring Basis | Fair Value, Inputs, Level 3
Assets and liabilities recorded at fair value
Derivative assets		0
Derivative liabilities	0
Available-for-sale securities	28,092	25,274
Recurring Basis | Fair Value
Assets and liabilities recorded at fair value
Derivative assets		18,926
Derivative liabilities	8,395
Available-for-sale securities	$ 28,092	25,274
Non-recurring Basis
Assets and liabilities recorded at fair value
Aggregate impairments		1,300
Non-recurring Basis | Fair Value, Inputs, Level 1
Assets and liabilities recorded at fair value
Impaired land and development		0
Non-recurring Basis | Fair Value, Inputs, Level 2
Assets and liabilities recorded at fair value
Impaired land and development		0
Non-recurring Basis | Fair Value, Inputs, Level 3
Assets and liabilities recorded at fair value
Impaired land and development		6,078
Non-recurring Basis | Fair Value
Assets and liabilities recorded at fair value
Impaired land and development		$ 6,078

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