Earnings Per Share - Additional Information (Detail)	3 Months Ended		6 Months Ended					1 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 1.75% Senior Convertible Notes due 2017 [Member]	Dec. 31, 2013 1.75% Senior Convertible Notes due 2017 [Member]	Jun. 30, 2013 1.75% Senior Convertible Notes due 2017 [Member]	May 31, 2014 IPO [Member]
Weighted Average Shares Used In Computing Earnings Per Share [Line Items]
Antidilutive stock options outstanding	120,000	333,000	131,000	333,000
Shares of common stock issued upon vesting of restricted stock	40,000	45,000	372,000	336,000
Common stock issued								5,750,000
Interest rate					1.75%	1.75%	1.75%