Investments in Unconsolidated Entities (Details 1) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013
Assets
Development in process	$ 121,353		$ 91,184
Liabilities and Equity
Carrying value of investment in unconsolidated entities	359,301		324,838
HSRE and DCV Holdings [Member]
Assets
Student housing properties, net	321,644		289,797
Development in process	120,444		81,994
Other assets	18,249		15,341
Total assets	460,337		387,132
Liabilities and Equity
Mortgage and construction loans	210,325		165,445
Other liabilities	58,800		58,948
Owners' equity	191,212		162,739
Total liabilities and owners' equity	460,337		387,132
Company's share of historical owners' equity	67,446		41,390
Preferred investment	21,799	[1]	16,468	[1]
Net difference in carrying value of investment versus net book value of underlying net assets	4,046	[2]	5,388	[2]
Carrying value of investment in unconsolidated entities	93,291		63,246
Copper Beech [Member]
Assets
Student housing properties, net	742,530		748,280
Intangible assets	23,340		37,100
Other assets	4,948		5,201
Total assets	770,818		790,581
Liabilities and Equity
Mortgage and construction loans	417,096		421,239
Other liabilities	6,896		13,112
Owners' equity	346,826		356,230
Total liabilities and owners' equity	770,818		790,581
Company's share of historical owners' equity	247,688		244,964
Net difference in carrying value of investment versus net book value of underlying net assets	18,322	[3]	16,628	[3]
Carrying value of investment in unconsolidated entities	$ 266,010		$ 261,592

[1] As of March 31, 2014, we had a Class B member interest in The Grove at Indiana, Pennsylvania, The Grove at Greensboro, North Carolina, and The Grove at Louisville, Kentucky, of approximately $2.7 million, $2.7 million and $1.9 million, respectively, entitling us to a 9.0% return on our investment upon the respective property being operational. We also had a CAD 16 million ($14.4 million) Class A interest in CSH Holdings entitling us to a commitment fee of 1.0% of the Class A interest each quarter and 10.0% annual return on our investment for the quarter ended March 31, 2014. As of December 31, 2013, we had a Class B member interest in The Grove at San Angelo, Texas, The Grove at Conway, Arkansas, The Grove at Indiana, Pennsylvania, The Grove at Greensboro, North Carolina, and The Grove at Louisville, Kentucky, of approximately $2.8 million, $6.4 million, $2.7 million, $2.7 million and $1.9 million, respectively, entitling us to a 9.0% return on our investment upon the respective property being operational.

[2] This amount represents the aggregate excess of our carrying amount above our underlying equity in the net assets of our developments, which is typically amortized over the life of the related asset. The basis differential occurs primarily due to the difference between the allocated value to acquired entity interests and the venture’s basis in those interests, the capitalization of additional investment in the unconsolidated entity and the elimination of service related revenue to the extent of our percentage ownership.

[3] This amount represents the aggregate difference between our historical cost basis and the basis reflected at the entity level, which is typically amortized over the life of the related asset. The basis differential occurs primarily due to the capitalization of additional investment in the unconsolidated entity.