Commitments and Contingencies (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 StudentHousingProperty sqft Building
Commitments and Contingencies (Textual) [Abstract]
Maximum cumulative escrow deposit	$ 1,900
Number of buildings	15
Deposited in escrow	1,079
Expected fund to be deposit in escrow	855
Additional fund escrow deposit	151
Capital escrow account balance	87
Insurance costs in proportion of real estate taxes	1/12th
Real estate tax and insurance escrow balance amount	919
Cash reserve of rental payment from tenant	8,633
Quarterly deposit for cash reserve from cash on hand	550
Number of student	6
Annual amount deposit by student-oriented communities	224
Reserve to fund future furniture replacement costs	$ 323
Maximum expansion of building square footage	286,000
Expansion of building till date	Feb. 28, 2016
Right to expand at any time before the lease period	ninth year
Tenant has the right to expand till any time prior to the period	fourth year