Stockholders' Equity - Stock Incentive Plan (Schedule of Shares Outstanding and Available for Grant Under Plan) (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock incentive plan, shares authorized for grant	3,500
Number of stock options outstanding under the 2013 Plan	(2,334)	(1,967)
Weighted average exercise price	$ 17.33	$ 15.22
Weighted average term (in years)	8 years 2 months 12 days	8 years
Number of shares remaining for future grants
Shares available for issuance	3,496
Stock Incentive Plans
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock incentive plan, shares authorized for grant	3,500
Number of shares remaining for future grants transferred from Prior Plan	844
Number of stock options outstanding under the 2013 Plan	(780)
Weighted average exercise price	$ 25.05
Weighted average term (in years)	9 years 9 months 18 days
Number of restricted stock units issued under the 2013 Plan	(68)
Number of shares remaining for future grants
Shares available for issuance	3,496