Related-Party Transactions and Agreements (Details) (USD $)	1 Months Ended	12 Months Ended	4 Months Ended	1 Months Ended	12 Months Ended	15 Months Ended	0 Months Ended		12 Months Ended	66 Months Ended
	Oct. 25, 2013	Dec. 31, 2012	Oct. 25, 2013	Feb. 13, 2012	Mar. 30, 2012	Jun. 30, 2013	Apr. 02, 2012	Jan. 20, 2012	Dec. 31, 2011	Feb. 13, 2012
Related Party Transaction [Line Items]
Organization and offering costs incurred and written off		$ 27,315,249
Aggregate purchase price of remaining interest in the Operating Partnership common units	1,312
Restated Advisory Agreement | Wells TIMO
Related Party Transaction [Line Items]
Related Party Transactions, Asset Management Fee, Percentage			0.083%
Advisory fees measurement basis threshold on disposal assets			5,000,000
Advisory fees measurement basis threshold on acquisition of assets			5,000,000
Advisory fees as % of Assets Under Management maximum			1.00%
Advisory Agreement Amendment No. 1 | Wells TIMO
Related Party Transaction [Line Items]
Related Party Transactions, Asset Management Fee, Percentage				0.25%
Fee and expense reimbursements, percentage of assets under management					1.50%	1.00%
Free cash flow in excess, interest on outstanding debt multiplier					1.05
Advisory Agreement | Wells TIMO
Related Party Transaction [Line Items]
Organization and offering costs as % of gross offering proceeds										1.20%
Organization and offering costs charged to additional paid-in capital										3,600,000
Disposition commission, threshold for commission percentage							20,000,000
Commissions, maximum, percentage of sales price							6.00%
Payments under Advisory Agreement upon default							0
Organization and offering costs incurred and written off								25,100,000	2,200,000
Organization and offering costs percentage of cumulative gross proceeds after write-off										0.50%
Advisory Agreement | Maximum | Wells TIMO
Related Party Transaction [Line Items]
Disposition commission, percentage of proceeds under threshold							2.00%
Disposition commission, percentage of proceeds over threshold							1.00%
Transition Service Agreement | Wells REF
Related Party Transaction [Line Items]
Number of Targeted Personnel hired from Wells REF	8
Monthly consulting fee	22,875
Days after the termination date for unpaid reimbursements to be fully paid	30 days
Sublease Agreement [Member] | Wells REF
Related Party Transaction [Line Items]
Monthly rental expense under sublease	$ 5,961
Advisory Agreement Amendment No. 2 | Wells TIMO
Related Party Transaction [Line Items]
Number of quarters of free cash flow, management fee threshold						4
Cash flow in excess, interest expense multiplier						1.25