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Schedule of share-based compensation arrangement by share-based payment award, Percent of maximum granted shares to vest if maximum stock price performance is achieved.

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Share-based compensation arrangement by share-based payment award, option term.

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Share-based compensation arrangement by share-based payment award, share conversion ratio.

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Share based compensation arrangements by share based payment award options share closing price.

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Face amount or stated value per share of common stock.

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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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Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

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Unrecognized cost of unvested options awarded to employees as compensation.

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Amount of cash inflow from realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes.

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Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

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The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

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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 equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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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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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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The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan.

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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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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Gross number of share options (or share units) granted during the period.

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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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The weighted average of per share prices paid for shares purchased on the open market for issuance to employees under the plan.

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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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Purchase price of common stock expressed as a percentage of its fair value.

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Number of shares issued during the period as a result of an employee stock purchase plan.

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Amount of stock repurchase plan authorized.

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Amount remaining of a stock repurchase plan authorized.

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Number of shares that have been repurchased and retired during the period.

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Stockholders' Equity and Stock-Based Compensation - Textual (Details)		12 Months Ended
	May 24, 2013 shares	Dec. 31, 2016 USD ($) $ / shares shares	Dec. 26, 2015 USD ($) $ / shares shares	Dec. 27, 2014 USD ($) $ / shares shares	May 29, 2012 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock authorized		47,000,000	47,000,000
Common stock, par value per share \| $ / shares		$ 0.001	$ 0.001
Shares of preferred stock authorized		3,000,000	3,000,000
Preferred stock, par value per share \| $ / shares		$ 0.001	$ 0.001
Number of shares repurchased and retired		0	111,050	362,633
Amount available for repurchase at end of period \| $			$ 4,397,000	$ 6,118,000
Weighted average fair value per share of stock options \| $ / shares				$ 8.13
Number of options granted		0	0	74,300
Closing stock price \| $ / shares		$ 25.06
Intrinsic value of options exercised \| $		$ 2,700,000	$ 1,600,000	$ 3,000,000
Fair value of options vested \| $		700,000	1,500,000	3,200,000
Unrecognized compensation costs \| $		200,000
Excess tax benefit \| $		$ 1,000,000	$ 0	$ 0
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum percentage of salary withholdings		10.00%
Purchase price of common stock, percent		85.00%
Shares remaining for issuance under the ESPP		100,000
Shares purchased under the ESPP		212,619	125,504	122,112
Weighted average price of shares issued (in dollars per share) \| $ / shares		$ 14.29	$ 13.98	$ 13.76
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average remaining amortization period for unrecognized compensation costs		1 year 9 months 7 days
Shares per unit granted		1.7
Granted (in shares)		476,667	506,459
Unrecognized compensation costs \| $		$ 8,000,000
Cancelled (in shares)		54,253	119,033
Restricted Stock Units (RSUs) [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period of vesting		3 years
Restricted Stock Units (RSUs) [Member] \| Key Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)		476,667	506,459
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average remaining amortization period for unrecognized compensation costs		7 months 24 days
Performance-Based Restricted Stock Units (PSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)		67,500	60,000
Percent of granted shares that will vest if target stock price performance is achieved		66.70%
Maximum percent of granted shares that will vest if maximum stock price performance is achieved		100.00%
Cancelled (in shares)		6,667
Performance-Based Restricted Stock Units (PSUs) [Member] \| Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period of vesting		1 year
Performance-Based Restricted Stock Units (PSUs) [Member] \| Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period of vesting		2 years
Performance-Based Restricted Stock Units (PSUs) [Member] \| Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period of vesting		3 years
2012 Share Repurchase Program [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Amount available for repurchase at end of period \| $		$ 4,400,000
May 29, 2012 Program [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum amount of common stock approved to repurchase, Value \| $					$ 20,000,000
2005 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Ratio of restricted stock units against available for grant pool	1.7
Number of shares of common stock authorized	2,600,000	7,292,594
Option term	7 years
2005 Equity Incentive Plan [Member] \| Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)		810,334
Cancelled (in shares)		92,230
2005 Equity Incentive Plan [Member] \| Performance-Based Restricted Stock Units (PSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)		114,750
Cancelled (in shares)		11,334