Related-Party Transactions and Arrangements (Details) (USD $)														3 Months Ended		6 Months Ended			3 Months Ended		6 Months Ended			3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended			3 Months Ended		6 Months Ended				3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2012 Average invested assets between $0 to $2 billion	Jun. 30, 2012 Average invested assets between $2 billion to $4 billion	Jun. 30, 2012 Average invested assets over $4 bilion	Jun. 30, 2012 Maximum Average invested assets between $0 to $2 billion	Jun. 30, 2012 Maximum Average invested assets between $2 billion to $4 billion	Jun. 30, 2012 Minimum Average invested assets between $0 to $2 billion	Jun. 30, 2012 Minimum Average invested assets between $2 billion to $4 billion	Jun. 30, 2012 Minimum Average invested assets over $4 bilion	Jun. 30, 2012 Advisors	Jun. 30, 2012 Advisors Minimum	Jun. 30, 2012 Selling commissions Dealer manager commission Maximum	Jun. 30, 2012 Selling commissions Advisors	Jun. 30, 2011 Selling commissions Advisors	Jun. 30, 2012 Selling commissions Advisors	Jun. 30, 2011 Selling commissions Advisors	Jun. 30, 2012 Selling commissions reallowed by cole capital Dealer manager commission reallowed	Jun. 30, 2012 Selling commissions reallowed by cole capital Advisors	Jun. 30, 2011 Selling commissions reallowed by cole capital Advisors	Jun. 30, 2012 Selling commissions reallowed by cole capital Advisors	Jun. 30, 2011 Selling commissions reallowed by cole capital Advisors	Jun. 30, 2012 Dealer manager fee Dealer manager	Jun. 30, 2012 Dealer manager fee Advisors	Jun. 30, 2011 Dealer manager fee Advisors	Jun. 30, 2012 Dealer manager fee Advisors	Jun. 30, 2011 Dealer manager fee Advisors	Jun. 30, 2012 Dealer manager fee reallowed by cole capital Advisors	Jun. 30, 2011 Dealer manager fee reallowed by cole capital Advisors	Jun. 30, 2012 Dealer manager fee reallowed by cole capital Advisors	Jun. 30, 2011 Dealer manager fee reallowed by cole capital Advisors	Jun. 30, 2012 Other organization and offering expenses Advisors	Jun. 30, 2011 Other organization and offering expenses Advisors	Jun. 30, 2012 Other organization and offering expenses Advisors	Jun. 30, 2011 Other organization and offering expenses Advisors	Jun. 30, 2012 Other organization and offering expenses Advisors Maximum	Jun. 30, 2012 Acquisition fees and expenses Advisors	Jun. 30, 2011 Acquisition fees and expenses Advisors	Jun. 30, 2012 Acquisition fees and expenses Advisors	Jun. 30, 2011 Acquisition fees and expenses Advisors	Jun. 30, 2012 Acquisition fees and expenses Advisors Maximum	Jun. 30, 2012 Acquisition fees and expenses Advisors Maximum Contract purchase price of each asset	Jun. 30, 2012 Advisory fees and expenses Advisors	Jun. 30, 2011 Advisory fees and expenses Advisors	Jun. 30, 2012 Advisory fees and expenses Advisors	Jun. 30, 2011 Advisory fees and expenses Advisors	Jun. 30, 2012 Operating expenses Advisors	Jun. 30, 2011 Operating expenses Advisors	Jun. 30, 2012 Operating expenses Advisors	Jun. 30, 2011 Operating expenses Advisors	Jun. 30, 2012 Property sales commission Advisors Contract sale price of each property [Member] Gross revenue for single-tenant properties	Jun. 30, 2012 Property portfolio Advisors Maximum	Jun. 30, 2012 Performance fee Advisors	Jun. 30, 2012 Performance fee Advisors Listing commission	Jun. 30, 2012 Brokerage commission fee Advisors Maximum Contract sale price of each property [Member]
Related Party Transaction [Line Items]
Commissions percentage on stock sales and related dealer manager fees													7.00%					100.00%					2.00%
Organization and offering expense limit, percent																																				1.50%
Offering and related costs paid by related party																																		$ 4,800,000
Offering and related costs paid by related party, not included in the financial statement																																		3,800,000
Related party transaction, expenses from transactions with related party														2,946,848	185,255	3,631,749	185,255		2,946,848	185,255	3,631,749	185,255		866,085	54,249	1,071,188	54,249	502,172	32,441	611,535	32,441	653,349	60,526	809,203	60,526		171,922	657,000	171,922	657,000			0	0	0	0	0	0	0	0
Acquisition and advisory fee																																									6.00%	2.00%
Annualized rate percentage paid on average invested asset			0.75%	0.70%	0.65%
Average invested assets						2,000,000,000	4,000,000,000	0	2,000,000,000	4,000,000,000
Operating expense reimbursement percent												2.00%
Operating expense reimbursement percent of net income												25.00%
Commissions performance and other fees percent																																																			1.00%	6.00%	15.00%	15.00%	50.00%
Cumulative noncompounded annual return											8.00%
Due to affiliates	$ 0	$ 4,696,155