Income Taxes and Distributions (Schedule of Reconciliation Income Tax Expense (Benefit) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Tax at statutory rate on earnings from continuing operations before unconsolidated entities, noncontrolling interests and income taxes	$ 220,252,000	$ 280,005,000	$ 176,069,000
Increase (decrease) in valuation allowance	85,881,000	3,465,000	28,309,000
Tax at statutory rate on earnings not subject to federal income taxes	(300,196,000)	(311,224,000)	(206,937,000)
Foreign permanent depreciation	1,504,000	9,260,000	8,110,000
Other differences	2,527,000	21,451,000	3,123,000
Income tax expense (benefit)	$ 9,968,000	$ 2,957,000	$ 8,674,000