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Stock-Based Compensation - Summary of Option Activity (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 29, 2017
Options
Outstanding at beginning of period (in shares)	529,675
Granted (in shares)	0
Exercised (in shares)	(18,940)
Forfeited or expired (in shares)	(70,093)
Outstanding at end of period (in shares)	440,642
Vested and unvested expected to vest at end of period (in shares)	292,051
Exercisable at end of period (in shares)	127,891
Weighted Average Exercise Price
Outstanding at the beginning of the period (in USD per share)	$ 37.90
Granted (in USD per share)	0.00
Exercised (in USD per share)	37.50
Forfeited or expired (in USD per share)	41.91
Outstanding at the end of the period (in USD per share)	37.25
Vested and unvested expected to Vest at end of period (in USD per share)	36.31
Exercisable at end of period (in USD per share)	$ 39.91
Weighted-Average Remaining Contractual Term, Vested and Unvested Expected to Vest at end of period	5 years 3 months
Weighted-Average Remaining Contractual Term, Exercisable at end of period	4 years 7 months
Aggregate Intrinsic Value, Vested and Unvested Expected to Vest at end of period	$ 0.0
Aggregate Intrinsic Value, Exercisable at end of period	$ 0.0
Market price (in USD per share)		$ 62.61

X

- Definition

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Number of fully vested and expected to vest exercisable options that may be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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