Equity-Based Compensation - Schedule of Key Weighted-average Assumptions Utilized in Black-Scholes Option Pricing Model for Stock Options Granted (Detail) - 6 months ended Jun. 30, 2015 - $ / shares	Total
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Grant date fair value	$ 4.50
Risk-free interest rate	1.63%
Expected volatility	36.67%
Expected dividend yield	4.28%
Expected life (in years)	6 years 3 months