NET INCOME PER UNIT (Tables)

6 Months Ended

Jun. 30, 2011

NET INCOME PER UNIT [Abstract]

Unit amounts used in the computation of basic and diluted net income per unit

	Three Months Ended June 30,		Six Months Ended June 30,
	2011	2010	2011	2010
Basic units outstanding:
Weighted-average number of basic units outstanding	42,544,659	42,514,494	42,544,659	42,514,494
Diluted units outstanding:
Weighted-average number of basic units outstanding	42,544,659	42,514,494	42,544,659	42,514,494
Effect of dilutive securities	41,265	—	40,464	—
Weighted-average number of diluted units outstanding	42,585,924	42,514,494	42,585,123	42,514,494