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Share-Based Compensation - Schedules of Award Activity (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Restricted Stock and Restricted Stock Units
Number of Awards
Beginning outstanding balance (in shares)	16,667
Granted (in shares)	0
Vested (in shares)	(16,667)
Forfeited (in shares)	0
Ending outstanding balance (in shares)	0	16,667
Weighted Average Fair Value
Beginning outstanding balance (in dollars per share)	$ 9.90
Granted (in dollars per share)	0
Vested (in dollars per share)	9.90
Forfeited (in dollars per share)	0
Ending outstanding balance (in dollars per share)	$ 0	$ 9.90
Total fair value of vested stocks	$ 0.2	$ 1.2	$ 1.1
Restricted Stock Units (RSUs)
Number of Awards
Beginning outstanding balance (in shares)	242,362
Granted (in shares)	198,487
Vested (in shares)	(228,029)
Forfeited (in shares)	(18,598)
Ending outstanding balance (in shares)	194,222	242,362
Weighted Average Fair Value
Beginning outstanding balance (in dollars per share)	$ 7.41
Granted (in dollars per share)	33.46
Vested (in dollars per share)	7.42
Forfeited (in dollars per share)	15.06
Ending outstanding balance (in dollars per share)	$ 33.29	$ 7.41
Total fair value of vested stocks	$ 1.7	$ 0.7	0.6
Performance shares
Number of Awards
Beginning outstanding balance (in shares)	60,000
Granted (in shares)	0
Vested (in shares)	(59,000)	0
Forfeited (in shares)	(1,000)
Ending outstanding balance (in shares)	0	60,000
Weighted Average Fair Value
Beginning outstanding balance (in dollars per share)	$ 9.29
Granted (in dollars per share)	0
Vested (in dollars per share)	9.28
Forfeited (in dollars per share)	9.80
Ending outstanding balance (in dollars per share)	$ 0	$ 9.29
Total fair value of vested stocks	$ 0.5		$ 1.6
Stock options
Shares
Beginning outstanding balance (in shares)	75,000
Granted (in shares)	0	0	0
Exercised (in shares)	0	0	0
Forfeited (in shares)	0
Expired (in shares)	(75,000)
Ending outstanding balance (in shares)	0	75,000
Weighted Average Exercise Price
Beginning outstanding balance (in dollars per share)	$ 46.60
Granted (in dollars per share)	0
Exercised (in dollars per share)	0
Forfeited (in dollars per share)	0
Expired (in dollars per share)	46.60
Ending outstanding balance (in dollars per share)	$ 0	$ 46.60

X

- Definition

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

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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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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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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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.

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

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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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