Stockholders' Equity - Summary of Basic and Diluted Earnings Per Share (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Oct. 06, 2016
Jul. 07, 2016
Apr. 09, 2015
Jan. 08, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                
Income (loss) from continuing operations attributable to Holdings $ 47,862 $ 8,737 $ 50,198 $ 3,146        
Less: Profit Allocation paid to Holdings 8,196 0 16,829 0        
Less: Profit Allocation paid to Holdings 812 883 1,292 2,837        
Less: Effect of contribution based profit - Holding Event 38,854 7,854 32,077 309        
Income (loss) from discontinued operations, net of income tax $ (291) $ 4,688 $ 589 $ 9,834        
Basic and diluted weighted average shares outstanding 54,300 54,300 54,300 54,300        
Continuing operations $ 0.72 $ 0.14 $ 0.59 $ 0.01        
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share 0.03 2.87 0.05 2.96        
Earnings Per Share, Basic and Diluted $ 0 $ 0 $ 0 $ 0        
Distribution declared per share         $ 0.36 $ 0.36 $ 0.36 $ 0.36
Discontinued Operations, Disposed of by Sale [Member]                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                
Less: Profit Allocation paid to Holdings $ 0 $ 27 $ 0 $ 0        
Income (loss) from continuing operations before income taxes 1,843 155,763 $ 2,723          
Income (loss) from discontinued operations, net of income tax $ 1,843 $ 155,736   $ 160,909