Employee Incentive and Retirement Plans - Additional Information (Detail)		3 Months Ended
	Feb. 09, 2016 USD ($)	Mar. 31, 2016 USD ($) EquityPlan $ / shares shares	Mar. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2015 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Tax benefit from stock compensation expense		$ 39,000	$ 0
Outstanding (shares) | shares		48,454,660		48,208,911
Option granted to purchase of common stock (shares) | shares		4,547,230
Options granted, weighted average exercise price ($ per share) | $ / shares		$ 8.48
Total intrinsic values of options exercised		$ 27,900,000	10,800,000
Total fair value of shares vested		$ 10,300,000	6,100,000
Repurchased (shares) | shares		2,282,700
Retirement Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period		90 days
Employer 401(k) Match		4.00%
Employer discretionary contribution amount		$ 5,000
Cost recognized		$ 1,500,000	$ 600,000
Share Repurchase
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized repurchase	$ 150,000,000
Authorized repurchase period	1 year
Cost ($ per share) | $ / shares		$ 8.52
Cost		$ 19,500,000
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option granted to purchase of common stock (shares) | shares			768,500
Options granted, weighted average exercise price ($ per share) | $ / shares			$ 20.81
Common stock, weighted average grant date fair value per share ($ per share) | $ / shares		$ 4.26	$ 10.27
Options granted, total estimated fair value		$ 19,400,000	$ 7,900,000
Unrecognized compensation cost		$ 85,900,000
Unrecognized compensation cost expected period for recognition		1 year 3 months
Employee Stock Option - Vested
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option granted to purchase of common stock (shares) | shares		265,987
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost expected period for recognition		3 years 8 months
RSUs granted (shares) | shares		9,168,791
Aggregate fair value		$ 77,100,000
Unrecognized compensation cost		$ 126,900,000
Available for ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Purchase period		6 months
Purchase price of common stock		85.00%
Total common stock authorized and reserved for future issuance (shares) | shares		6,916,954
Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of equity incentive plans | EquityPlan		2
Equity Incentive Plan Two Thousand Seven
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding (shares) | shares		42,810,226
Equity Incentive Plan Twenty Fourteen
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Available for grant (shares) | shares		44,040,590
Internally Developed Software
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense, capitalized amount		$ 1,900,000	$ 800,000