Business Segment Information (Reconciliation Of Segment Margin To (Loss) Income from Continuing Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Segment Reporting [Abstract]
Total Segment Margin	$ 141,340	$ 140,710	$ 428,707	$ 333,398
Corporate general and administrative expenses	(10,420)	(25,940)	(32,269)	(52,192)
Depreciation and amortization	(54,265)	(41,170)	(156,800)	(96,500)
Interest expense	(34,735)	(29,617)	(104,657)	(66,737)
Adjustment to exclude distributable cash generated by equity investees not included in income and include equity in investees net income (1)	(9,063)	(7,962)	(30,818)	(25,383)
Non-cash items not included in Segment Margin	(1,779)	(1,316)	5,428	(473)
Cash payments from direct financing leases in excess of earnings	(1,586)	(1,448)	(4,645)	(4,215)
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain	0	335,260	0	335,260
Loss on extinguishment of debt	0	0	0	(19,225)
Other, Net Items Included in Segment Margin	0	(6,643)	0	(6,643)
Income tax expense	(949)	(1,292)	(2,959)	(3,142)
Net Income (Loss) Attributable to Parent	$ 32,101	$ 363,214	$ 91,131	$ 395,094