Senior Secured Revolving Credit Facility (Details) (USD $)			4 Months Ended	12 Months Ended				0 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2011 Revolving Credit Facility [Member] property	Dec. 31, 2012 Revolving Credit Facility [Member] property	Sep. 07, 2011 Revolving Credit Facility [Member] LIBOR Plus [Member] Minimum [Member]	Sep. 07, 2011 Revolving Credit Facility [Member] LIBOR Plus [Member] Maximum [Member]	Sep. 07, 2011 Letter of Credit [Member] Maximum [Member]	Sep. 07, 2011 Above Threshold [Member] Revolving Credit Facility [Member] Option 1 [Member]	Sep. 07, 2011 Below Threshold [Member] Revolving Credit Facility [Member] Option 2 [Member]	Dec. 31, 2012 Line of Credit [Member]	Sep. 07, 2011 Line of Credit [Member] Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Debt to be Extinguished Upon Consummation of Merger											$ 150,000,000
Line of Credit Facility, Maximum Borrowing Capacity							10,000,000			150,000,000
Debt Instrument, Basis Spread on Variable Rate					2.15%	2.90%
Unused capacity fee percentage								0.15%	0.25%
Debt, fair value			42,400,000
Interest rate during period			3.17%	3.11%
Properties collateralized, in properties			59	114
Line of Credit Facility, Remaining Borrowing Capacity			20,400,000
Long-term Line of Credit	$ 124,604,000	$ 42,407,000