Agreements and Transactions of Related Parties (Details 3) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Due from affiliates
Deferred acquistion fees receivable	$ 18,537	$ 28,654
Reimbursable costs	905	1,457
Organization and offering costs	6,721	4,920
Accounts receivable	2,459	182
Asset management fee receivable	48	789
Due from affiliates	$ 28,670	$ 36,002