Related Party Transactions and Arrangements (Schedule of Offering Costs Reimbursements to Related Parties) (Details) (Manager [Member], ARC Properties Advisors, LLC [Member], Fees and Expense Reimbursement, Stock Offering [Member], USD $)	3 Months Ended		6 Months Ended			12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 Payable [Member]	Dec. 31, 2012 Payable [Member]
Schedule of Offering Costs Reimbursements to Related Parties [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	$ 499,000	$ 12,869,000	$ 1,114,000	$ 20,231,000	$ 100,000	$ 0