Income Taxes (Reconciliation of Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Aug. 31, 2014
Reconciliation of income tax expense computed by applying federal corporate tax rate
Tax at statutory rate on earnings from continuing operations before unconsolidated entities, noncontrolling interest and income taxes	$ 181,478	$ 123,086	$ 122,746
State income taxes, net of federal benefit	(1,022)	(657)	(1,152)
Increase in valuation allowance	3,921	20,978	23,122
(Decrease) increase in ASC 740 income tax liability	(3,582)	(462)	878
Tax at statutory rate on earnings not subject to federal income taxes	(209,204)	(185,648)	(151,055)
Foreign rate differential and foreign taxes	2,094	3,095	3,230
Change in tax status of TRS	(5,629)	0	(7,380)
Other differences	601	324	879
Income tax benefit	(31,343)	(39,284)	$ (8,732)
Holiday Retirement
Business Acquisition [Line Items]
Net deferred tax liability				$ 107,700
HCT
Business Acquisition [Line Items]
Net deferred tax liability		32,300
Crimson
Business Acquisition [Line Items]
Net deferred tax liability		$ 18,500
Life Sciences Acquisitions
Business Acquisition [Line Items]
Net deferred tax liability	$ 9,400