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Stock Plans - Additional Information (Detail) - USD ($)	1 Months Ended			12 Months Ended
	May 31, 2018	Jul. 31, 2017	May 31, 2017	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Option awards granted during period				0
Share-based compensation expense				$ 20,188,000	$ 14,949,000	$ 6,527,000
Total income tax benefit recognized for all share-based compensation awards				4,007,000	3,580,000	1,849,000
Tax benefits realized from options exercised and RSUs and PSUs vested				30,268,000	$ 7,210,000	$ 2,114,000
Compensation costs capitalized				0
Total unrecognized compensation cost related to inducement option, stock options, RSUs and PSUs granted				$ 41,496,000
Compensation expense recognition period				1 year 7 months 6 days
Options outstanding, exercise price, lower range				$ 3.97	$ 3.97	$ 3.97
Options outstanding, exercise price, upper range				63.59	63.59	$ 63.59
Expected term						6 years
Weighted-average grant-date fair value of vesting options granted				$ 0.00	$ 15.21	$ 5.79
Total intrinsic value of vesting options exercised				$ 105,647,000	$ 5,930,000	$ 117,000
Cash received from options exercised				$ 33,385,000	$ 5,475,000	$ 139,000
Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term					6 years
Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term					7 years
Inducement Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock option awards, expiration period					7 years
Restricted stock units, vesting period					4 years
Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term				7 years
Stock Option | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock option awards, expiration period				7 years
Restricted stock units, vesting period				3 years	3 years	3 years
Stock Option | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock option awards, expiration period				10 years
Restricted stock units, vesting period				5 years	5 years	5 years
Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term				7 years
Granted				$ 63.91	$ 31.58	$ 12.68
Other than options, total fair value				$ 8,484,000	$ 10,211,000	$ 5,145,000
Other than options, granted				274,000
Vested				379,000
Restricted Stock Units | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock units, vesting period				2 years
Restricted Stock Units | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock units, vesting period				4 years
Performance-based stock unit
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted				$ 80.18	$ 27.22	$ 13.19
Other than options, total fair value						$ 8,000
Other than options, granted	81,300	47,900	98,500	81,000		289,900
Performance period (years)					3 years
Net debt to EBITDA ratio						450.00%
Vested				0	0
Chief Executive Officer
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation, fully-vested shares granted					40,000
Share based compensation, value of fully-vested shares granted					$ 604,000
Chief Executive Officer | Inducement Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Option awards granted during period					500,000
Stock Incentive Plan 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stocks to be purchased through options				8,500,000
Stock Incentive Plan 2004
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation, fully-vested shares granted				11,000	30,000	36,000
Share based compensation, value of fully-vested shares granted				$ 754,000	$ 664,000	$ 451,000

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- Definition

Represents the compensation cost capitalized during the period arising from equity-based compensation arrangements (for example, shares of stock, units, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Unrecognized cost of unvested share-based compensation awards.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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