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Subsequent Events - Additional Information (Detail) (Subsequent Event, USD $)
 1 Months Ended
Apr. 30, 2014
Subsequent Event [Line Items]  
Proceeds from sale of stock $ 32,500,000
Per share dividend $ 0.02
Payment date May 15, 2014
Date of record May 05, 2014
Dividend payable $ 845,000
Public Offering One | Class B
  
Subsequent Event [Line Items]  
Shares sold 3,400,000
Public Offering One | Class B | Underwriters Option To Purchase Units
  
Subsequent Event [Line Items]  
Shares sold 514,100
Shares sold, price per share $ 10.50
Public Offering Two
  
Subsequent Event [Line Items]  
Shares sold 3,200,000
Public Offering Two | Underwriters Option To Purchase Units
  
Subsequent Event [Line Items]  
Shares sold 343,000