NET INCOME PER UNIT (Tables)

3 Months Ended

Mar. 31, 2012

NET INCOME PER UNIT [Abstract]

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

	Three Months Ended March 31,
	2012	2011
Basic units outstanding:
Weighted-average number of basic units outstanding	42,574,419	42,544,659
Diluted units outstanding:
Weighted-average number of basic units outstanding	42,574,419	42,544,659
Effect of dilutive securities	23,222	39,654
Weighted-average number of diluted units outstanding	42,597,641	42,584,313