Agreements and Transactions with Related Parties (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Amounts Included in Consolidated Statements of Operations:
Acquisition fees	$ 4,072	$ 634	$ 12,427	$ 1,505
Asset management fees	833	171	1,783	358
Loan refinancing fees	0	0	0	37
Personnel reimbursements	342	175	974	563
Related party fees included in operating expenses	5,247	980	15,184	2,463
Other transaction fees incurred:
Selling commissions and dealer manager fees	20,139	2,397	40,444	5,753
Offering costs	2,080	517	6,247	1,236
Transaction fees incurred	$ 22,219	$ 2,914	$ 46,691	$ 6,989