Amounts Incurred for Management Fee and Reimbursable Expenses (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Related Party Transactions [Abstract]
Management fee	$ 4,122	$ 4,522	$ 12,420	$ 13,956
Reimbursable expenses	715	701	2,403	1,869
Total Expenses	4,837	5,223	14,823	15,825
Share based compensation	$ 890	$ 637	$ 2,592	$ 1,893