Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 35,177	$ 20,215
Adjustments to reconcile net income to net cash provided by operating activities -
Depreciation and amortization	46,635	27,125
Amortization of debt issuance costs and discount	2,441	1,247
Amortization of unearned income and initial direct costs on direct financing leases	(3,656)	(3,805)
Payments received under direct financing leases	5,167	5,167
Equity in earnings of investments in equity investees	(10,717)	(15,519)
Cash distributions of earnings of equity investees	15,543	18,075
Non-cash effect of equity-based compensation plans	(1,103)	3,161
Deferred and other tax liabilities	700	608
Unrealized loss on derivative transactions	1,651	1,534
Other, net	1,335	(1,279)
Net changes in components of operating assets and liabilities (Note 12)	(52,067)	5,936
Net cash provided by operating activities	41,106	62,465
CASH FLOWS FROM INVESTING ACTIVITIES:
Payments to acquire fixed and intangible assets	(118,252)	(111,504)
Cash distributions received from equity investees - return of investment	5,788	7,827
Investments in equity investees	(1,135)	(1,750)
Acquisitions	(25,394)	0
Proceeds from Contribution in Aid of Construction	4,088	0
Proceeds from asset sales	224	1,768
Other, net	130	29
Net cash used in investing activities	(134,551)	(103,630)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings on senior secured credit facility	319,400	226,200
Repayments on senior secured credit facility	(154,400)	(128,200)
Distributions to common unitholders	(72,087)	(56,542)
Other, net	1,948	1,383
Net cash provided by financing activities	94,861	42,841
Net increase in cash and cash equivalents	1,416	1,676
Cash and cash equivalents at beginning of period	10,895	9,462
Cash and cash equivalents at end of period	12,311	11,138
Noncontrolling Interest
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ (126)	$ 0