Stock Plans - Additional Information (Detail) - USD ($)				1 Months Ended		3 Months Ended	12 Months Ended
	Jun. 22, 2015	May 22, 2015	May 07, 2015	Jul. 31, 2017	May 31, 2017	Jan. 02, 2016	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016	Oct. 19, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Option awards granted during period							1,302,000
Share-based compensation expense							$ 14,949,000	$ 6,527,000	$ 24,771,000
Total income tax benefit recognized for all share-based compensation awards							3,580,000	1,849,000	8,170,000
Tax benefits realized from options exercised and RSUs and PSUs vested							7,210,000	$ 2,114,000	$ 274,000
Compensation costs capitalized							0
Total unrecognized compensation cost related to inducement option, stock options, RSUs and PSUs granted							$ 46,735,000
Compensation expense recognition period							1 year 10 months 24 days
Options outstanding, exercise price, lower range							$ 3.97
Options outstanding, exercise price, upper range								$ 63.59
Expected term								6 years	6 years
Options outstanding							5,884,000	5,113,000
Weighted-average exercise price							$ 18.17	$ 11.76
Stock option expense						$ 12,759,000
Weighted-average grant-date fair value of vesting options granted							$ 15.21	$ 5.79	$ 4.86
Total intrinsic value of vesting options exercised							$ 5,930,000	$ 117,000	$ 17,000
Proceeds from stock options exercised							$ 5,475,000	$ 139,000	$ 95,000
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
Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stocks to be purchased through options										3,513,000
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
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
Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term							7 years
Granted							$ 31.58	$ 12.68	$ 5.55
Other than options, total fair value							$ 10,211,000	$ 5,145,000	$ 1,804,000
Other than options, granted							682,000
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
Special Performance Based Options Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Option awards granted during period									37,000
Compensation expense recognition period							3 years
Expected term							0 years	0 years	5 years
Percentage of time-vesting criteria satisfied on third anniversary of date of grant							100.00%
Vesting of stock options increments							20.00%
Performance period (years)							5 years
Options To Purchase Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock units, vesting period	3 years
Options outstanding	734,000	1,700,000
Percentage of options eligible for exchange		99.60%
Weighted-average exercise price	$ 5.25	$ 24.68
Stock option expense	$ 1,599,000
Options To Purchase Common Stock | Vesting on the first anniversary
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage	25.00%
Options To Purchase Common Stock | Vesting on the second anniversary
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage	25.00%
Options To Purchase Common Stock | Vesting on the third anniversary
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage	50.00%
Performance-based stock unit
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Performance period (years)							3 years
Granted							$ 27.22	$ 13.19
Other than options, total fair value							$ 0	$ 8,000
Other than options, granted				47,900	98,500		146,000	289,900
Net debt to EBITDA ratio								450.00%
Performance-based stock unit | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock issuable							113,900
Other than options, shares expected to vest								61,100
Performance-based stock unit | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock issuable							244,000
Other than options, shares expected to vest								305,400
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 2014 | Chief Executive Officer
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock conversion ratio			350.00%
Stock Incentive Plan 2014 | Employees
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock conversion ratio			200.00%
Stock Incentive Plan 2004
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation, fully-vested shares granted							30,000	36,000	50,000
Share based compensation, value of fully-vested shares granted							$ 664,000	$ 451,000	$ 507,000