NET INCOME PER UNIT (Tables)

9 Months Ended

Sep. 30, 2011

NET INCOME PER UNIT [Abstract]

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

	Three Months Ended September 30,		Nine Months Ended September 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	25,612	—	35,459	—
Weighted-average number of diluted units outstanding	42,570,271	42,514,494	42,580,118	42,514,494