Stock-Based Compensation (Detail) - Summary Of Changes In RSUs Outstanding (USD $)	12 Months Ended
	Dec. 31, 2014
Restricted Stock Units (RSUs)
Granted (in shares)	300,000
Restricted Stock Units (RSUs)
Restricted Stock Units (RSUs)
Outstanding at December 31, 2013 (in shares)	1,800,000
Granted (in shares)	600,000	[1]
Vested and released (in shares)	(900,000)
Forfeited (in shares)	(100,000)
Outstanding at December 31, 2014 (in shares)	1,400,000	[2],[3]
Per Share Weighted Average Grant Date Fair Value
Outstanding at December 31, 2013 (in Dollars per share)	38.83
Granted (in Dollars per share)	65.48	[1]
Vested and released (in Dollars per share)	34.17
Forfeited (in Dollars per share)	0.00
Outstanding at December 31, 2014 (in Dollars per share)	50.76	[2],[3]

[1] The 0.6 million RSUs granted in 2014 consisted of 0.3 million performance-based RSUs awarded to executives and 0.3 million service-based RSUs awarded to non-executive employees and non-management board members. The aggregate target number of performance-based RSUs awarded in 2014 was 0.2 million, subject to adjustment from 0% to 200% of the target number depending upon the increase in the Company's subscription-based contract value ("CV') measured on December 31, 2014 compared to December 31, 2013. The actual CV increase achieved for 2014 was 172.6%, which resulted in the final grant of approximately 0.3 million performance-based RSUs to the executives.

[2] The weighted-average remaining contractual term of the outstanding RSUs is approximately 1 year.

[3] The Company expects that substantially all of the outstanding awards at December 31, 2014 will vest in future periods.