v2.4.0.6
QUARTERLY FINANCIAL DATA (UNAUDITED) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Mar. 31, 2010
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Quarterly Financial Information [Line Items]                      
Revenues $ 1,927,105 $ 1,824,350 $ 1,589,184 $ 1,234,616 $ 1,194,212 $ 1,138,379 $ 1,124,941 $ 945,529 $ 6,575,255 $ 4,403,061 $ 3,855,871
Operating income (loss) 47,935 92,977 117,351 55,731 70,464 90,290 102,030 39,773 313,994 302,557 273,316
Net income $ 30,199 $ 70,281 $ 92,605 $ 28,516 $ 51,535 $ 68,310 $ 99,422 $ 19,703 $ 221,601 $ 238,970 $ 224,875
Net income per unit applicable to limited partners $ 0.30 $ 0.92 $ 1.27 $ 0.30 $ 0.65 $ 0.90 $ 1.43 $ 0.19 $ 2.78 $ 3.19 $ 3.47
Cash distributions per unit applicable to limited partners $ 1.095 $ 1.095 $ 1.095 $ 1.075 $ 1.075 $ 1.075 $ 1.065 $ 1.065 $ 4.360 $ 4.280 $ 4.245