Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Consolidated Statements Of Comprehensive Income [Abstract]
Net income	$ 93,524	$ 90,065
Other comprehensive income:
Reclassification of net gain on interest rate cash flow hedges to interest expense	(41)	(41)
Amortization of prior service credit and actuarial loss	852	78
Total other comprehensive income	811	37
Comprehensive income	94,335	90,102
Comprehensive loss attributable to non-controlling owners' interest in consolidated subsidiaries		(63)
Comprehensive income attributable to partners' capital	$ 94,335	$ 90,165