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Subsequent Events - Additional Information (Detail) (Dividend Declared, USD $)
 1 Months Ended
Jan. 31, 2013
Dividend Declared
  
Subsequent Event [Line Items]  
Distribution declared $ 0.0775
Partners capital projected distribution amount on annualized basis $ 0.31
Minimum dividend distribution per unit $ 0.0675
Percentage of distributions to common unit holders in excess of minimum quarterly distribution 90.00%
Percentage of distributions to general unit holders in excess of minimum quarterly distribution 10.00%
Amount to paid to common unit holders $ 4,600,000
Amount to paid to the General Partner 55,000
Incentive distribution to the General Partner 33,000
Incentive distributions to Management $ 33,000
Dividend record date Jan. 28, 2013
Dividend payable date Feb. 05, 2013