Organization and Ownership (Details)	Mar. 31, 2014
Beneficial Owner, James C. Reynolds
Real Estate Properties [Line Items]
Beneficial ownership percent of Class A Common Stock	12.00%
Wholly Owned Properties
Real Estate Properties [Line Items]
Number of properties	4
Rentable square feet (in square feet)	1,200,000
Unconsolidated Properties
Real Estate Properties [Line Items]
Number of properties	6
Rentable square feet (in square feet)	1,100,000
Number of Joint Venture	4
Number of Real Estate Buildings	12
Unconsolidated Properties | Minimum
Real Estate Properties [Line Items]
Unconsolidated joint venture ownership interest percentage	5.00%
Unconsolidated Properties | Maximum
Real Estate Properties [Line Items]
Unconsolidated joint venture ownership interest percentage	32.20%
Unconsolidated Properties with Managing Ownership Interests
Real Estate Properties [Line Items]
Number of Joint Venture	1
Unconsolidated Properties, Excluding City Square Sports Club in Phoenix, Arizona [Member]
Real Estate Properties [Line Items]
Number of Real Estate Buildings	12