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	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Schedule of Offering Costs Reimbursements to Related Parties [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	$ 728,000	$ 7,362,000
Payable [Member]
Schedule of Offering Costs Reimbursements to Related Parties [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	$ 0	$ 0