Quarterly report pursuant to sections 13 or 15(d)

Related Party Transactions - Additional Information (Detail)

v2.4.0.8
Related Party Transactions - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Dec. 31, 2012
Related Party Transaction [Line Items]          
Income from management fees $ 2,299 $ 2,205 $ 4,479 $ 4,235  
Income from performance fees 0 16 3 16  
Due to related parties 1,018   1,018   1,622
Income from advisory fees 102 116 205 214  
Receivable from partners $ 16   $ 16   $ 17
Minimum [Member]
         
Related Party Transaction [Line Items]          
Management and advisory fees percentage     0.00%    
Percentage of performance fees     0.00%    
Maximum [Member]
         
Related Party Transaction [Line Items]          
Management and advisory fees percentage     1.75%    
Percentage of performance fees     10.00%