Shareholders' Equity (Other than Options) (Details) - $ / shares	12 Months Ended
Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Restricted Stock
Shares
Unvested Shares, Beginning Balance (in shares)	13,941
Granted, Shares (in shares)	16,490
Vested, Shares (in shares)	(13,941)
Forfeited, Shares (in shares)	(830)
Unvested Shares, Ending Balance (in shares)	15,660	13,941
Weighted Average Fair Value at Grant Date
Beginning Balance (in dollars per share)	$ 80.70
Granted (in dollars per share)	74.68	$ 80.70	$ 57.43
Vested (in dollars per share)	80.70
Forfeited (in dollars per share)	80.25
Ending Balance (in dollars per share)	$ 74.38	$ 80.70
Weighted Average Remaining Contractual Term	4 months 9 days	4 months 18 days
Restricted Stock Units (RSUs)
Shares
Unvested Shares, Beginning Balance (in shares)	260,533
Granted, Shares (in shares)	78,140
Vested, Shares (in shares)	(98,636)
Forfeited, Shares (in shares)	(5,213)
Unvested Shares, Ending Balance (in shares)	234,824	260,533
Weighted Average Fair Value at Grant Date
Beginning Balance (in dollars per share)	$ 70.81
Granted (in dollars per share)	74.51	$ 80.48	57.50
Vested (in dollars per share)	76.25
Forfeited (in dollars per share)	69.71
Ending Balance (in dollars per share)	$ 69.78	$ 70.81
Weighted Average Remaining Contractual Term	1 year 6 months 22 days	1 year 8 months
Performance Share Units
Shares
Unvested Shares, Beginning Balance (in shares)	155,116
Granted, Shares (in shares)	50,659
Vested, Shares (in shares)	(1,359)
Forfeited, Shares (in shares)	(36,576)
Unvested Shares, Ending Balance (in shares)	167,840	155,116
Weighted Average Fair Value at Grant Date
Beginning Balance (in dollars per share)	$ 70.43
Granted (in dollars per share)	83.80	$ 90.82	$ 51.84
Vested (in dollars per share)	57.43
Forfeited (in dollars per share)	83.55
Ending Balance (in dollars per share)	$ 71.71	$ 70.43
Weighted Average Remaining Contractual Term	1 year 9 months 29 days	1 year 11 months 23 days

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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
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- Definition

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.

+ References

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-Publisher FASB
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-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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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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The weighted average fair value at grant date for nonvested equity-based awards issued 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.

+ References

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-Publisher FASB
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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

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

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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