Unaudited Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 26,938	$ 35,177
Adjustments to reconcile net income to net cash provided by operating activities -
Depreciation and amortization	56,112	46,635
Amortization of debt issuance costs and discount	2,582	2,441
Amortization of unearned income and initial direct costs on direct financing leases	(3,500)	(3,656)
Payments received under direct financing leases	5,167	5,167
Equity in earnings of investments in equity investees	(11,335)	(10,717)
Cash distributions of earnings of equity investees	15,107	15,543
Non-cash effect of equity-based compensation plans	864	(1,103)
Deferred and other tax liabilities	205	700
Unrealized loss on derivative transactions	142	1,651
Other, net	1,391	1,335
Net changes in components of operating assets and liabilities (Note 11)	(29,068)	(52,067)
Net cash provided by operating activities	64,605	41,106
CASH FLOWS FROM INVESTING ACTIVITIES:
Payments to acquire fixed and intangible assets	(61,292)	(118,252)
Cash distributions received from equity investees - return of investment	5,518	5,788
Investments in equity investees	0	(1,135)
Acquisitions	0	(25,394)
Proceeds from Contribution in Aid of Construction	124	4,088
Proceeds from asset sales	1,234	224
Other, net	0	130
Net cash used in investing activities	(54,416)	(134,551)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings on senior secured credit facility	216,700	319,400
Repayments on senior secured credit facility	(284,900)	(154,400)
Issuance of common units for cash, net	140,968	0
Distributions to common unitholders	(83,765)	(72,087)
Other, net	4,552	1,948
Net cash provided by financing activities	(6,445)	94,861
Net increase in cash and cash equivalents	3,744	1,416
Cash and cash equivalents at beginning of period	7,029	10,895
Cash and cash equivalents at end of period	$ 10,773	$ 12,311