Summary of Equity-Based Compensation Activity (Detail)	3 Months Ended
	Mar. 31, 2014
Restricted stock units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Balance as of January 1, 2014	241,854
Granted
Exercised
Forfeited	(3,184)
Balance as of March 31, 2014	238,670
Vested	107,971
Unvested	130,699
Stock options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Balance as of January 1, 2014	787,500
Options granted
Exercised
Balance as of March 31, 2014	787,500
Vested	787,500