Management Contracts Intangible, net (Details) (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014	Dec. 19, 2013
Management contracts
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 1,800,000	$ 3,600,000
Management contracts, net of accumulated amortization	8,300,000	8,300,000
Thomas Properties Group, Inc | Contract-Based Intangible Assets
Acquired Finite-Lived Intangible Assets [Line Items]
Fair value of management contracts			1,900,000
Amortization expense	189,000	378,000
Management contracts, net of accumulated amortization	$ 1,500,000	$ 1,500,000