Stock-Based Compensation - Additional Information (Detail) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2016 USD ($) OptionPlan Installment $ / shares shares	Mar. 28, 2015 USD ($) $ / shares	Dec. 31, 2015 Installment shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Compensation Plans \| OptionPlan	3
Share based awards, number of equal annual installments \| Installment	3		3
Vesting period, years	3 years
Number of options vested			7,225
Number of shares vested	464
Number of stock options unvested			23,328
Number of shares unvested	121,702		15,916
Number of shares granted	109,714
Total intrinsic value of stock options exercised \| $	$ 1,700	$ 1,600
Fair value of stock options vested \| $	3,400	3,800
Allocated Share-based compensation expense \| $	1,482	$ 1,198
Unrecognized stock-based compensation expense \| $	$ 9,900
Weighted average, expected recognition period	2 years 3 months 18 days
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vested			226
Number of shares unvested			677
Number of shares granted	0
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted	0
Black-Scholes Option Valuation Model
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant-date fair value of stock options granted \| $ / shares	$ 12.37	$ 17.48

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Share Based Compensation Arrangement By Share Based Payment Award Number Of Equal Annual Installments For Award Vesting

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- Definition

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Number of non-vested options outstanding.

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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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Number of options vested.

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