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Stock Based Compensation - Summary of Stock Option Activity (Detail)
12 Months Ended
Dec. 31, 2016
USD ($)
$ / shares
shares
Dec. 31, 2015
USD ($)
$ / shares
shares
Dec. 31, 2014
USD ($)
$ / shares
shares
Dec. 31, 2013
$ / shares
shares
Conversion Of TMM Holdings Class J Units Into TPG and Oaktree Units [Member] | J Units [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Common stock conversion ratio       1
New TMM Units [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Compensation expense pursuant to change in control provisions | $ $ 0 $ 1,400,000    
Number of Awards        
Beginning balance (in shares) | shares 1,312,874 1,431,721 1,655,469  
Exchanges (in shares) | shares (159,863) (87,055) (196,024)  
Forfeited (in shares) | shares (6,654) (31,792) (27,724)  
Ending balance (in shares) | shares 1,146,357 1,312,874 1,431,721 1,655,469
Unvested New TMM Units included in ending balance (in shares) | shares 80,178 419,855 792,320  
Weighted Average Grant Date Fair Value        
Beginning balance (usd per share) | $ / shares $ 5.45 $ 5.11 $ 5.02  
Exchanges (usd per share) | $ / shares 4.34 3.88 4.22  
Forfeited (usd per share) | $ / shares 8.63 5.24 6.09  
Ending balance (usd per share) | $ / shares 5.58 5.45 5.11 $ 5.02
Unvested New TMM Units included in ending balance (usd per share) | $ / shares $ 8.73 $ 5.85 $ 5.30  
Unamortized value of New TMM Units | $ $ 417,000 $ 1,568,000 $ 3,345,000  
Weighted-average period expense is expected to be recognized 7 months 6 days 9 months 18 days 2 years 2 months 12 days