Management Contracts Intangible, net (Details) (USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2014	Dec. 19, 2013
Management contracts
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 1,800,000	$ 5,300,000
Management contracts, net of accumulated amortization	6,500,000	6,500,000
Thomas Properties Group, Inc | Contract-Based Intangible Assets
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization expense	189,000	567,000
Management contracts, net of accumulated amortization	1,300,000	1,300,000
Fair value of management contracts			$ 1,900,000