Preferred Stock, Stockholders' Equity and Members' Deficit - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended	9 Months Ended			1 Months Ended	9 Months Ended			3 Months Ended	9 Months Ended			9 Months Ended					9 Months Ended		9 Months Ended
	Mar. 31, 2012	Sep. 28, 2013	Sep. 30, 2012	Sep. 28, 2013	Sep. 30, 2012	Dec. 31, 2012	Sep. 28, 2013 Equity Incentive Plan Twenty Thirteen	May 31, 2013 Equity Incentive Plan Twenty Thirteen	Sep. 28, 2013 Redeemable Preferred Stock	Mar. 31, 2012 Stock Options	Sep. 28, 2013 Stock Options	Sep. 28, 2013 Stock Options With Performance Based Criteria	Dec. 31, 2012 Stock Options With Performance Based Criteria	Sep. 28, 2013 Employee Stock Purchase Plan	Sep. 28, 2013 Employee Stock Purchase Plan	Sep. 28, 2013 Restricted Stock Units (RSUs)	Dec. 31, 2012 Restricted Stock Units (RSUs)	Sep. 28, 2013 Restricted Stock Units (RSUs) Minimum	Sep. 28, 2013 Restricted Stock Units (RSUs) Maximum	Sep. 28, 2013 Employee Stock Purchase Plans	Sep. 28, 2013 Restricted Stock Units With Proformance Based Criteria	Dec. 31, 2012 Restricted Stock Units With Proformance Based Criteria	Sep. 28, 2013 IPO Stock Options	Dec. 31, 2012 IPO Stock Options	Sep. 28, 2013 Limited Liability Conversion
Schedule Of Stockholders Equity [Line Items]
LLC Conversion, share of common stock issued																									16,851,635
LLC Conversion, shares of common stock applicable to fully vested options granted																									448,349
LLC Conversion, shares of common stock applicable to fully vested options, exercise price																									$ 0.02
Share-based compensation expense		$ 7,067,000	$ 1,693,000	$ 25,357,000	$ 2,329,000									$ 2.3	$ 2.4								$ 8,500,000
Deferred income tax, net adjustment		14,800,000		14,800,000
Retained earnings				24,000,000
Redeemable convertible Series A preferred units -units authorized		0		0		8,110,000			20,000,000
Redeemable convertible Series A preferred units - units outstanding		0		0		8,110,000
Common units, units authorized		0		0		33,333,333
Common units votes per unit						1
Common units, units outstanding		0		0		17,300,005
Common stock, shares authorized		1,000,000,000		1,000,000,000
Common stock, par value		$ 0.0001		$ 0.0001		$ 0.0001
Common stock, shares issued		30,491,907		30,491,907
Common stock, shares outstanding		30,491,907		30,491,907
Redeemable convertible Series A preferred units, per unit value		$ 2.81		$ 2.81		$ 2.81			$ 0.0001
Shares authorized for future issuance								2,929,481						439,422	439,422
Additional common stock shares authorized upon termination of awards under the 2012 Plan							4,967,172
Shares allowable for future authorization each year							1,464,740
Percentage of outstanding shares of common stock							5.00%
Vesting Period										4 years								3 years	4 years
Period of expiration of vested but unexercised options description										Vested stock options may be exercised up to ten years from the vesting commencement date. Under the 2012 Plan, vested but unexercised stock options expire 30 days after termination of service with the Company. Under the 2013 Equity Plan, vested but unexercised stock options expire three months after termination of service with the Company.
Percent vest on first anniversary from grant date	25.00%
Share price		$ 39.12		$ 39.12		$ 13.11										$ 39.12	$ 13.11
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value				$ 12.08	$ 5.77
Common stock subject to options outstanding		3,669,322		3,669,322		2,418,397						39,998	50,666											1,070,316
Plan Description															The ESPP provides for a 24-month offering period comprised of four purchase periods of approximately six months. Employees are able to purchase shares at 85% of the lower of the fair market value of the Company’s common stock (i) at the date of commencement of the offering period or (ii) at the last day of the purchase period
Compensation expense related to unvested stock options											$ 11,800,000					$ 11,200,000				$ 7,600,000
Compensation Expense Weighted-average remaining Amortization period											1 year 6 months					1 year 6 months				1 year 3 months 18 days
Number of RSUs outstanding																815,141	149,841				8,666	8,666