Investment in Office Properties (Details) (USD $) In Millions, unless otherwise specified		0 Months Ended		0 Months Ended
	Mar. 31, 2014 State sqft	Jan. 30, 2014 Office Building JTB Center sqft Property	Mar. 31, 2014 Property Subject to Operating Lease Office Building sqft Property	Apr. 02, 2014 Subsequent Event Office Building JTB Center
Business Acquisition [Line Items]
Number of real estate properties		3	42
Number of states in which office properties located	8
Area of real estate property (in square feet)	3,073,000	248,000	14,600,000
Acquisition purchase price		$ 33.3
Properties occupancy percentage				94.40%