Income Taxes and Distributions (Details 2) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Reconciliation of Income Tax Expense
Tax at statutory rate on earnings from continuing operations before unconsolidated entities, noncontrolling interests and income taxes		$ 372,030	$ 313,250	$ 178,862
Change in valuation allowance	[1]	(2,128)	13,759	9,133
Tax at statutory rate on earnings not subject to federal income taxes		(399,571)	(319,832)	(189,070)
Foreign Permanent Depreciation		9,205	7,500	4,383
Other differences		1,336	(8,226)	(4,575)
Income tax (expense) benefit		$ (19,128)	$ 6,451	$ (1,267)

[1] Excluding purchase price accounting.