NET INCOME (LOSS) PER COMMON UNIT (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Net Income (Loss) Available to Common Stockholders, Basic [Abstract]
Net income from continuing operations	$ 21,197		$ 24,329		$ 9,609		$ 10,893
Net income from continuing operations attributable to noncontrolling interests in consolidated entities	(11,402)		(7,079)		(12,540)		(8,345)
Net income (loss) from continuing operations attributable to common unit holders	9,795		17,250		(2,931)		2,548
(Loss) Income from discontinued operations	0		(2,582)		42		2,842
Net income (loss) from discontinued operations attributable to noncontrolling interests in consolidated entities	0		1,429		(22)		(1,243)
Net (income) loss from discontinued operations attributable to common unit holders	0		(1,153)		20		1,599
Net income (loss) attributable to common unitholders	$ 9,795		$ 16,097		$ (2,911)		$ 4,147
Net income (loss) per common unit - basic: (in dollars per unit)
Net income (loss) from continuing operations	$ 0.34		$ 0.57		$ (0.10)		$ 0.08
Net (loss) income from discontinued operations	$ 0.00		$ (0.04)		$ 0.00		$ 0.06
Net income (loss) attributable to common unitholders	$ 0.34		$ 0.53		$ (0.10)		$ 0.14
Earnings Per Share, Diluted, Two Class Method [Abstract]
Net income (loss) from continuing operations	$ 0.34		$ 0.57		$ (0.10)		$ 0.08
Net (loss) income from discontinued operations	$ 0.00		$ (0.04)		$ 0.00		$ 0.06
Net income (loss) attributable to common unitholders	$ 0.34		$ 0.53		$ (0.10)		$ 0.14
Weighted Average Number of Shares Outstanding, Basic [Abstract]
Weighted average common units outstanding - basic (in shares)	28,739,858		30,128,047		29,765,843		30,194,928
Unvested restricted units (in shares)	35,582		0		0		0
Denominator for net income per common unit - diluted (in shares)	28,775,440	[1]	30,128,047	[1]	29,765,843	[1]	30,194,928	[1]
Incentive Units
Weighted Average Number of Shares Outstanding, Basic [Abstract]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount					16,032
Unvested Restricted Stock Units
Weighted Average Number of Shares Outstanding, Basic [Abstract]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount							35,134

[1] The following were excluded from the diluted per unit calculation as their impact would have been anti-dilutive; approximately 16,032 incentive units and approximately 35,134 unvested restricted units, for the six months ended June 30, 2014.