Share-Based Compensation Plan (Details Textual) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended	12 Months Ended		0 Months Ended	12 Months Ended					0 Months Ended	12 Months Ended			0 Months Ended	12 Months Ended			0 Months Ended
	Feb. 04, 2014	Dec. 31, 2013	Dec. 31, 2012	Feb. 04, 2014 Restricted Stock [Member]	Dec. 31, 2013 Restricted Stock [Member]	Dec. 31, 2012 Restricted Stock [Member]	Dec. 31, 2011 Restricted Stock [Member]	Dec. 31, 2013 Restricted Stock [Member] Minimum [Member]	Dec. 31, 2013 Restricted Stock [Member] Maximum [Member]	Feb. 04, 2014 Performance Shares [Member]	Dec. 31, 2013 Performance Shares [Member]	Dec. 31, 2012 Performance Shares [Member]	Dec. 31, 2013 LongTermIncentivePartnershipUnitsClassA [Member]	Dec. 13, 2013 LongtermincentivepartnershipunitsclassB [Member]	Dec. 31, 2013 Long Term Incentive Partnership Units [Member]	Dec. 31, 2012 Long Term Incentive Partnership Units [Member]	Dec. 31, 2011 Long Term Incentive Partnership Units [Member]	Feb. 08, 2012 February 2012 [Member] Performance Shares [Member]	Jan. 30, 2013 January 2013 [Member] Performance Shares [Member]	Dec. 13, 2013 December 2013 [Member] Performance Shares [Member]	Dec. 13, 2013 December 2013 [Member] Performance Shares [Member] Minimum [Member]	Dec. 13, 2013 December 2013 [Member] Performance Shares [Member] Maximum [Member]
Share-Based Compensation Plan (Textual) [Abstract]
Share-based award vesting period	3 years	6 years						3 years	5 years
Number of common shares available for issuance under the 2009 Equity Incentive Plan		978,129
Allocated Share-based Compensation Expense					$ 1.5	$ 1.5	$ 1.1				$ 2.1	$ 1.1			$ 1.6	$ 1.6	$ 1.6
Total unrecognized compensation cost					2.2						10.2				8.1
Weighted average remaining vesting period (in years)					3 years 5 months						3 years 5 months				2 years 7 months
Share-based equity award grant				44,322	84,451	52,545	79,330			66,483								72,056	72,118	252,088
Estimated Shares Expected to Vest Minimum and Maximum																					0.00%	200.00%
Shares Expected to Vest Not Subject to Maximum																		12,048	11,753
Value of LTIP grants per share													$ 8.50	$ 29.19
LTIP Units Granted														226,882
Grant date fair value of performance-based equity awards														$ 6.6
Operating Partnership outstanding		607,991	381,109
LTIP units, vested		185,820											185,820