Agreements and Transactions with Related Parties (Narratives) (Details) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended	3 Months Ended
	Jan. 31, 2013	Mar. 31, 2013	Mar. 31, 2012
Asset Management Fees
Offering price on shares for asset management fees		$ 10.00
Number of shares held by advisor		4,418,143
Advisor owned percentage of common stock		1.40%
Percentage of Available cash distribution to advisor		10.00%
Personnel And Office Rent Reimbursement [Abstract]
Percentage of average invested asset guideline		2.00%
Percentage of net income guideline		25.00%
Transaction Fees [Abstract]
Preferred return by advisor		5.00%
Average percentage of acquisition fees payable		4.50%
Average percentage of acquisition fees payable current		2.50%
Average percentage of acquisition fees payable deferred		2.00%
Payment of deferred acquisition fees to advisors		$ 6.0	$ 4.8
Subordinated disposition fees percentage		3.00%
Organization And Offering Expenses [Abstract]
Percentage limit on O&O	15.00%
Selling commission per share sold	$ 0.65
Dealer revenue per share sold	$ 0.35
Underwriting compensation percentage limit	10.00%
Due diligence expense reimbursement percentage	0.50%
Percentage overage advisor pay O&O	4.00%
Reimbursed offering costs		20.6
Deferred offering costs		$ 20.8
Maximum
Transaction Fees [Abstract]
Percentage of inital acquisition fees		1.75%
Related party additional disclosures
Ownership interest in joint ventures		85.00%
Maximum | Average equity value of certain securities
Asset Management Fees
Percentage of asset management fees		1.75%
Minimum
Transaction Fees [Abstract]
Percentage of inital acquisition fees		0.00%
Related party additional disclosures
Ownership interest in joint ventures		12.00%
Minimum | Average market value for long-term net leases
Asset Management Fees
Percentage of asset management fees		0.50%