Earnings Per Unit - Computation of Basic and Diluted Earnings Per Unit (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Numerator:
Income (Loss) from Continuing Operations	$ 3,689	$ (1,270)	$ 8,242	$ (360)
Gain on Sale of Real Estate	0	0	0	262
Income from Continuing Operations Allocable to Participating Securities	(38)	0	(63)	0
Preferred Unit Distributions	0	(2,277)	(1,019)	(6,114)
Redemption of Preferred Units	0	(3,546)	(1,462)	(3,546)
Income (Loss) from Continuing Operations Available to Unitholders	3,651	(7,093)	5,698	(9,758)
Income from Discontinued Operations	538	12,663	1,063	10,363
Income from Discontinued Operations Allocable to Participating Securities	(5)	(42)	(12)	(78)
Income from Discontinued Operations Attributable to Unitholders	533	12,621	1,051	10,285
Net Income Available to Unitholders and Participating Securities	4,227	5,570	6,824	605
Net Income Allocable to Participating Securities	(43)	(42)	(75)	(78)
Net Income Available to Unitholders	$ 4,184	$ 5,528	$ 6,749	$ 527
Denominator:
Weighted Average Units - Basic	114,278	112,808	114,262	109,163
LTIP Unit Awards	589	0	564	0
Weighted Average Units - Diluted	114,867	112,808	114,826	109,163
Basic and Diluted EPU:
Income (Loss) from Continuing Operations Available to Unitholders	$ 0.03	$ (0.06)	$ 0.05	$ (0.09)
Income from Discontinued Operations Attributable to Unitholders	$ 0.01	$ 0.11	$ 0.01	$ 0.10
Net Income Available to Unitholders	$ 0.04	$ 0.05	$ 0.06	$ 0.01