CONDENSED CONSOLIDATED STATEMENT OF PARTNERS' CAPITAL AND COMPREHENSIVE INCOME (UNAUDITED) (USD $) In Thousands	Total	Partners Capital [Member]	Accumulated Other Comprehensive Income [Member]	Tax Sharing Note Receivable [Member]
Beginning balance at Dec. 31, 2010	$ 1,620,575	$ 1,640,691	$ (16,928)	$ (3,188)
Tax sharing note receivable	1,015	0	0	1,015
Comprehensive income:
Net earnings	85,831	85,831	0	0
Net change in other comprehensive loss	4,937	0	4,937	0
Comprehensive income	90,768	85,831	4,937	0
Ending balance at Jun. 30, 2011	$ 1,712,358	$ 1,726,522	$ (11,991)	$ (2,173)