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Partners' Capital, Equity and Incentive Compensation Plans - Summary of Award Activity Under 2013 and 2010 Equity Incentive Plans and Related Information (Detail) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Beginning balance, Options Outstanding         
Options, Granted 370,410      
Options, Exercised         
Options, Released from restriction         
Options, Cancelled/Expired (2,500)      
Ending balance, Options Outstanding 367,910      
Beginning balance, Weighted average exercise price options outstanding         
Weighted average exercise price options outstanding, Granted $ 21.00      
Weighted average exercise price options outstanding, Exercised         
Weighted average exercise price options outstanding, Released from restriction         
Weighted average exercise price options outstanding, Cancelled/Expired         
Ending balance, Weighted average exercise price options outstanding $ 21.00      
Beginning balance, Weighted average fair value of options         
Weighted average fair value of options, Granted $ 3.50      
Weighted average fair value of options, Cancelled/Expired $ 3.52      
Ending balance, Weighted average fair value of options $ 3.50      
Class O Units [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Beginning balance, Number of units 1,471,943 699,368 592,068
Number of units, Granted 224,244 908,925 114,676
Number of units, Cancelled/Expired (73,440) (136,350) (7,376)
Ending balance, Number of units 1,622,747 1,471,943 699,368
Beginning balance, Weighted average exercise price units $ 23.09 $ 20.00 $ 20.00
Weighted average exercise price units, Granted $ 25.00 $ 25.00 $ 20.00
Weighted average exercise price units, Exercised         
Weighted average exercise price units, Released from restriction         
Weighted average exercise price units, Cancelled/Expired         
Ending balance, Weighted average exercise price units $ 23.44 $ 23.09 $ 20.00
Beginning balance, Weighted average fair value $ 2.84 $ 4.38 $ 4.41
Weighted average fair value, Granted $ 10.62 $ 1.99 $ 4.18
Weighted average fair value, Cancelled/Expired $ 5.31 $ 4.41 $ 4.41
Ending balance, Weighted average fair value $ 3.84 $ 2.84 $ 4.38
Class RS Units [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Beginning balance, Number of units 178,750 50,000 50,000
Number of units, Granted   150,000  
Number of units, Released from restriction (5,000) (21,250)  
Ending balance, Number of units 173,750 178,750 50,000
Weighted average exercise price units, Exercised         
Weighted average exercise price units, Released from restriction         
Weighted average exercise price units, Cancelled/Expired         
Restricted Stock [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Beginning balance, Number of units         
Number of units, Granted 108,629      
Number of units, Exercised        
Number of units, Released from restriction         
Number of units, Cancelled/Expired         
Ending balance, Number of units 108,629      
Weighted average exercise price units, Granted $ 21.00    
Weighted average exercise price units, Exercised         
Weighted average exercise price units, Released from restriction         
Weighted average exercise price units, Cancelled/Expired         
Ending balance, Weighted average exercise price units $ 21.00