Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Monthly Distributions Declared and Paid by Company's Board of Directors (Detail)

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Stockholders' Equity - Monthly Distributions Declared and Paid by Company's Board of Directors (Detail) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Equity [Abstract]      
Dividend Distribution per Share $ 1.49    $ 0.37