Declaration of Distributions - Additional Information (Detail) (USD $)	Dec. 12, 2013
Equity [Abstract]
Common stock per share outstanding per day declared	$ 0.001917808

Amount represents the dividend per share of stock, per day for the declared period.

No definition available.

Name:	ck0001410567_CommonStockDividendsPerSharePerDayDeclared
Namespace Prefix:	ck0001410567_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant