Stockholders' Equity - Additional Information (Detail) (USD $)
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3 Months Ended | 12 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | |||||||||||||||||||||
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Dec. 31, 2012
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Dec. 31, 2012
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Dec. 31, 2011
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Oct. 05, 2011
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Jul. 29, 2011
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Jun. 08, 2011
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Dec. 31, 2012
Common Stock Subject to Mandatory Redemption
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Jul. 29, 2011
Cash Distribution
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Jul. 31, 2011
Stock Distribution
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Jul. 29, 2011
Stock Distribution
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Dec. 31, 2012
Stockholder
Minimum
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Dec. 31, 2012
Stockholder
Maximum
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Dec. 31, 2012
Reinvestment Plan
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Dec. 31, 2011
Reinvestment Plan
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Dec. 31, 2012
Common Stock
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Jul. 15, 2010
Public Offering
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Jul. 15, 2010
Public Offering
Distribution Reinvestment Plan
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Dec. 31, 2012
Stockholders who have owned their shares for at least one year
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Dec. 31, 2012
Stockholders who have owned their shares for at least four years
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Dec. 31, 2012
Acquisition 1
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Stockholders Equity Note [Line Items] | ||||||||||||||||||||||||||||
Common stock, shares | 18,447,553 | 18,447,553 | 1,357,572 | 1,120,000,000 | 300,000,000 | 15,000,000 | 22,222 | |||||||||||||||||||||
Common stock, value | $ 184,467 | $ 184,467 | $ 13,576 | $ 3,000,000,000 | $ 200,000 | |||||||||||||||||||||||
Common stock, per shares | $ 0.01 | $ 0.01 | $ 0.01 | $ 0.01 | $ 10.00 | $ 9.50 | ||||||||||||||||||||||
Capital stock, issued | 1,620,000,000 | |||||||||||||||||||||||||||
Capital stock, par value per share | $ 0.01 | |||||||||||||||||||||||||||
Preferred shares issued | 200,000,000 | |||||||||||||||||||||||||||
Excess shares | 300,000,000 | |||||||||||||||||||||||||||
Aggregate subscription in excess of minimum offering amount | 2,000,000 | |||||||||||||||||||||||||||
Aggregate offering proceeds received from public offering | 168,100,000 | 168,100,000 | 13,300,000 | 1,700,000 | 30,000 | |||||||||||||||||||||||
Shares issued from public offering | 16,900,000 | 16,900,000 | 1,300,000 | 0.200 | 0.003 | |||||||||||||||||||||||
Monthly cash distribution, per share | $ 0.03333 | |||||||||||||||||||||||||||
Total annualized distribution rate | 7.00% | 4.00% | 3.00% | |||||||||||||||||||||||||
Stock distribution, shares | 239,785 | [1],[2],[3] | 4,180 | [1],[2],[3] | 0.002500 | |||||||||||||||||||||||
Common stock offering price | $ 10.00 | $ 10.00 | $ 10.00 | |||||||||||||||||||||||||
Redemption Plan, share redemption percentage | 25.00% | 100.00% | ||||||||||||||||||||||||||
Proceeds from any public offering for redemptions | 100,000 | |||||||||||||||||||||||||||
Maximum weighted average number of common stock shares outstanding percentage | 5.00% | |||||||||||||||||||||||||||
Redemption pricing range percentage of purchase price per share | 92.50% | 100.00% | ||||||||||||||||||||||||||
Redemption of common stock, shares | 1,049 | |||||||||||||||||||||||||||
Common stock redemption price per share | $ 9.99 | |||||||||||||||||||||||||||
Percentage of total amount of selling commissions, marketing support fees, and other organizational and offering costs to be paid | 7.00% | 15.00% | ||||||||||||||||||||||||||
Stock issuance and other offering cost | $ 23,400,000 | $ 2,000,000 | ||||||||||||||||||||||||||
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