Share-Based Compensation Plan (Details Textual) (USD $) In Millions, except Share data, unless otherwise specified			3 Months Ended
	Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2012 Restricted Stock [Member] Y	Mar. 31, 2011 Restricted Stock [Member]	Mar. 31, 2012 Restricted Stock [Member] Minimum [Member]	Mar. 31, 2012 Restricted Stock [Member] Maximum [Member]	Mar. 31, 2012 Long Term Incentive Partnership Units [Member] Y	Mar. 31, 2011 Long Term Incentive Partnership Units [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Restricted stock vesting period					3 years	5 years
Share-based compensation expense			$ 0.3	$ 0.2			$ 0.4	$ 0.4
Total unrecognized compensation cost			$ 2.7				$ 4.3
Weighted average remaining vesting period (in years)			3.5				2.8
Share-Based Compensation Plan (Textual) [Abstract]
Number of common shares available for issuance under the 2009 Equity Incentive Plan	44,888
Operating Partnership outstanding	929,099	929,099
LTIP unit grants were valued at per unit	$ 8.50
LTIP units, vested	371,640