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           Subsequent Events - Monthly Distributions Declared by Company's Board of Directors (Detail) (Subsequent Event [Member], USD $) 
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        0 Months Ended | 
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           Apr. 08, 2014 
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| Subsequent Event [Line Items] | |
| Distribution per Common Share | $ 0.09 | 
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           Dividend Period One [Member] 
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| Subsequent Event [Line Items] | |
| Record Date | Apr. 21, 2014 | 
| Payment Date | Apr. 30, 2014 | 
| Distribution per Common Share | $ 0.03 | 
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           Dividend Period Two [Member] 
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| Subsequent Event [Line Items] | |
| Record Date | May 20, 2014 | 
| Payment Date | May 30, 2014 | 
| Distribution per Common Share | $ 0.03 | 
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           Dividend Period Three [Member] 
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| Subsequent Event [Line Items] | |
| Record Date | Jun. 19, 2014 | 
| Payment Date | Jun. 30, 2014 | 
| Distribution per Common Share | $ 0.03 | 
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- Definition 
          Date the declared dividend will be paid, in CCYY-MM-DD format. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          The per share amount of a dividend declared, but not paid, as of the financial reporting date. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format. No definition available. 
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- Details 
          
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