Quarterly report pursuant to Section 13 or 15(d)

Equity-Based Compensation - Grant Date Fair Value for Awards of Performance Units Inputs (Detail)

v3.7.0.1
Equity-Based Compensation - Grant Date Fair Value for Awards of Performance Units Inputs (Detail) - Performance Units - $ / shares
6 Months Ended
Jun. 30, 2017
Mar. 22, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share price (in usd per share)   $ 36.31
Expected volatility 36.00%  
Risk-free interest rate 1.46%  
Term in years 2 years 9 months 11 days