Stockholders' Equity - Summary of RSU and PSU Activity (Detail) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) $ / shares shares
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Number of Units outstanding, beginning of year (in shares) | shares	1,249
Number of Units, Granted (in shares) | shares	78
Number of Units, Released (in shares) | shares	(219)
Number of Units, Forfeited (in shares) | shares	(34)
Number of Units outstanding, end of period (in shares) | shares	1,074
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted Average Grant Date Fair Value, Units outstanding, beginning of year (in dollars per share) | $ / shares	$ 45.47
Weighted Average Grant Date Fair Value, Granted (in dollars per share) | $ / shares	69.19
Weighted Average Grant Date Fair Value, Released (in dollars per share) | $ / shares	35.49
Weighted Average Grant Date Fair Value, Forfeited (in dollars per share) | $ / shares	50.82
Weighted Average Grant Date Fair Value, Units outstanding, end of period (in dollars per share) | $ / shares	$ 49.05
Aggregate intrinsic value at end of period | $	$ 75,985
Performance Stock Units (PSUs)
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Number of Units outstanding, beginning of year (in shares) | shares	6,033
Number of Units, Granted (in shares) | shares	102
Number of Units, Released (in shares) | shares	(158)
Number of Units, Forfeited (in shares) | shares	(188)
Number of Units outstanding, end of period (in shares) | shares	5,789
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted Average Grant Date Fair Value, Units outstanding, beginning of year (in dollars per share) | $ / shares	$ 34.47
Weighted Average Grant Date Fair Value, Granted (in dollars per share) | $ / shares	42.41
Weighted Average Grant Date Fair Value, Released (in dollars per share) | $ / shares	24.88
Weighted Average Grant Date Fair Value, Forfeited (in dollars per share) | $ / shares	34.97
Weighted Average Grant Date Fair Value, Units outstanding, end of period (in dollars per share) | $ / shares	$ 34.86
Aggregate intrinsic value at end of period | $	$ 409,657