Income (Loss) Per Share (Summary of Computation of Diluted Income Per Share) (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Net loss allocated to common shareholders is not adjusted for:
Net loss attributable to noncontrolling interest in operating partnership units	$ (2,585)	$ (2,892)		$ (5,152)
Total	(2,512)	(2,841)	(4,003)	(4,989)
Weighted average diluted shares are not adjusted for:
Effect of unvested restricted shares/assumed conversion of operating partnership units, Total	20,074	19,084	19,836	18,731
Effect of unvested restricted shares
Net loss allocated to common shareholders is not adjusted for:
Income allocated to unvested restricted shares	73	51	231	163
Weighted average diluted shares are not adjusted for:
Effect of unvested restricted shares/assumed conversion of operating partnership units, Total	148	122	111	124
Effect of assumed conversion of operating partnership units
Weighted average diluted shares are not adjusted for:
Effect of unvested restricted shares/assumed conversion of operating partnership units, Total	19,926	18,962	19,725	18,607
Effect of assumed conversion of operating partnership units
Net loss allocated to common shareholders is not adjusted for:
Net loss attributable to noncontrolling interest in operating partnership units			$ (4,234)