Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 19,604	$ 7,030
Adjustments to reconcile net income to net cash provided by (used in) operating activities -
Depreciation and amortization	15,035	13,903
Amortization of debt issuance costs and premium	880	655
Amortization of unearned income and initial direct costs on direct financing leases	(4,241)	(4,349)
Payments received under direct financing leases	5,462	5,462
Equity in earnings of investments in equity investees	(3,492)	(3,197)
Cash distributions of earnings of equity investees	5,911	4,217
Non-cash effect of equity-based compensation plans	123	(135)
Deferred and other tax liabilities	(37)	145
Unrealized (gains) losses on derivative transactions	(1,992)	6,460
Other, net	(63)	426
Net changes in components of operating assets and liabilities, (See Note 12)	(17,268)	(32,722)
Net cash provided by (used in) operating activities	19,922	(2,105)
CASH FLOWS FROM INVESTING ACTIVITIES:
Payments to acquire fixed and intangible assets	(47,473)	(5,489)
Cash distributions received from equity investees - return of investment	4,314	2,283
Investments in equity investees	(33,542)	(194)
Acquisitions	(205,576)
Other, net	262	(20)
Net cash used in investing activities	(282,015)	(3,420)
CASH FLOWS FROM FINANCING ACTIVITIES:
Bank borrowings	509,200	127,600
Bank repayments	(480,300)	(98,100)
Proceeds from issuance of senior unsecured notes, including premium	101,000
Senior unsecured notes issuance costs	(2,584)
Issuance of common units for cash, net	169,524
Distributions to common unitholders	(31,677)	(25,846)
Other, net	437	264
Net cash provided by financing activities	265,600	3,918
Net increase (decrease) in cash and cash equivalents	3,507	(1,607)
Cash and cash equivalents at beginning of period	10,817	5,762
Cash and cash equivalents at end of period	$ 14,324	$ 4,155