Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 50,923	$ 49,748
Adjustments to reconcile net income to net cash provided by operating activities -
DepreciationDepletionAndAmortizationIncludingDiscOps	39,771	30,723
Depreciation and amortization	39,771	30,714
Amortization of debt issuance costs and premium	2,320	2,128
Amortization of unearned income and initial direct costs on direct financing leases	(7,922)	(8,136)
Payments received under direct financing leases	10,631	10,631
Equity in earnings of investments in equity investees	(12,740)	(9,559)
Cash distributions of earnings of equity investees	21,452	15,475
Non-cash effect of equity-based compensation plans	6,267	8,710
Deferred and other tax liabilities	853	(536)
Unrealized gains on derivative transactions	(1,187)	(2,023)
Other, net	1,518	93
Net changes in components of operating assets and liabilities, (Note 12)	(6,689)	(1,468)
Net cash provided by operating activities	105,197	95,786
CASH FLOWS FROM INVESTING ACTIVITIES:
Payments to acquire fixed and intangible assets	(240,994)	(107,166)
Cash distributions received from equity investees - return of investment	6,173	5,539
Investments in equity investees	(14,826)	(66,207)
Proceeds from asset sales	133	626
Other, net	(2,635)	171
Net cash used in investing activities	(252,149)	(167,037)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings on senior secured credit facility	1,181,200	668,500
Repayments on senior secured credit facility	(1,271,800)	(849,400)
Proceeds from issuance of senior unsecured notes, including premium	350,000	350,000
Debt issuance costs	(10,752)	(8,157)
Distributions to common unitholders	(96,236)	(79,795)
Other, net	0	(2,511)
Net cash provided by financing activities	152,412	78,637
Net increase in cash and cash equivalents	5,460	7,386
Cash and cash equivalents at beginning of period	8,866	11,282
Cash and cash equivalents at end of period	$ 14,326	$ 18,668