Share-Based Compensation - Schedule of Weighted Average Grant Date Fair Values of Awards Using Monte Carlo Simulation Valuation Model (Detail)	3 Months Ended
	Mar. 31, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected volatility, minimum	27.00%	[1]
Expected volatility, maximum	29.50%	[1]
Dividend yield	0.00%	[2]
Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Risk-free rate	1.20%	[3]
Expected term	2 years
Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Risk-free rate	1.50%	[3]
Expected term	3 years

[1] Due to limited trading history of our common stock, we used the historical and implied volatilities of our peer group in addition to our historical volatility over the performance period to estimate appropriate expected volatilities. The weighted average expected volatility was 28.4%.

[2] Dividends are assumed to be reinvested in shares of common stock and dividends will not be paid unless shares vest. We utilized a dividend yield of zero percent.

[3] Based on U.S. Separate Trading of Registered Interest and Principal Securities rates collected from Bloomberg.