Share-Based Compensation - Summary of Option Activity under 2013 Plan (Detail) (Option activity under the 2013 Plan [Member], USD $)	12 Months Ended
	Dec. 31, 2013
Option activity under the 2013 Plan [Member]
Schedule Of Stock Option Activity [Line Items]
Option outstanding, Shares, Beginning balance
Option granted, Shares	46,888
Option Exercised, Shares
Option outstanding, Shares, Ending balance	46,888
Option Exercisable, Shares, Ending balance
Option outstanding, Weighted Average Exercise Price, Beginning balance
Option granted, weighted average exercise price	$ 20.27
Option Exercised, Weighted Average Exercise Price
Option outstanding, Weighted Average Exercise Price, Ending balance	$ 20.27
Option Exercisable, Weighted Average Exercise Price, Ending balance
Option outstanding, Weighted Average Remaining Term	9 years 5 months 19 days
Option Exercisable, Weighted Average Remaining Term	0 years