Stock-Based Compensation - Summary of Assumptions Used to Determine Fair Value of Performance Based Restricted Stock Units (Detail) - Performance Based Restricted Stock Units [Member] - NEOs [Member]	Jul. 13, 2017 $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Closing price of our common stock	$ 32.5
Expected volatility of our common stock	31.00%
Expected volatility of peer companies	16.50%
Risk-free interest rate	1.56%
Dividend yield	1.66%
Correlation coefficient of peer companies	46.00%