Summary of Significant Accounting Policies (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Related Party Arrangements
Expected reimbursable organization and offering costs, excluding selling commissions and dealer manager fee, as a percentage of total proceeds available to be raised from the primary offering	1.50%
Maximum
Related Party Arrangements
Percentage of gross offering proceeds from the Primary Offering reimbursable as organization and offering costs	15.00%
Expected reimbursable organization and offering costs, excluding selling commissions and dealer manager fee	15.0
Advisor | Maximum
Related Party Arrangements
Percentage of gross offering proceeds from the Primary Offering reimbursable as organization and offering costs	15.00%
Expected reimbursable organization and offering costs, excluding selling commissions and dealer manager fee	15.0
Expected reimbursable organization and offering costs, excluding selling commissions and dealer manager fee, as a percentage of total proceeds available to be raised from the primary offering	1.50%