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New Accounting Pronouncements New Accounting Pronouncements and Changes in Accounting Principles (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Dec. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Prior Period Reclassification Adjustment	$ 0	$ 0	$ 595

X

- References

No definition available.

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- Definition

The amount of a reclassification adjustment made to prior period financial statement amounts.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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