Annual report pursuant to section 13 and 15(d)

Stockholders' Equity - Additional Information (Detail)

v2.4.0.8
Stockholders' Equity - Additional Information (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
 1 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Jul. 12, 2013
Class A Common Stock
Jul. 02, 2013
Class A Common Stock
Jul. 12, 2013
Class A Common Stock
Jul. 02, 2013
Class A Common Stock
Dec. 31, 2013
Class A Common Stock
Class Of Stock [Line Items]                  
Partnership distributions, amount   $ 29,317 $ 14,749 $ 9,994          
Amount distributed to existing partners   10,000              
Distributions of partner incentive allocations of net income 12,104   8,775 5,073          
Accrued partner incentive allocations $ 14,196                
Issuance of Class A shares in IPO, Shares         718,603 4,790,684 718,603 4,790,684 5,509,000