Organization and Description of Business (Details)	Dec. 31, 2012
Properties in Operation	39
Properties under Construction	6	[1]
Consolidated Entities [Member]
Properties in Operation	32
Properties under Construction	3	[1]
Unconsolidated Properties [Member]
Properties in Operation	7
Properties under Construction	3	[1]

[1] For the 2013-2014 academic year, consolidated entities under construction include The Grove at Fort Collins, Colorado, The Grove at Muncie, Indiana and The Grove at Pullman, Washington, and unconsolidated entities under construction include The Grove at Norman, Oklahoma, The Grove at State College, Pennsylvania, and The Grove at Indiana, Pennsylvania.