Interest Rate Swaps Schedule of Changes in AOCI Net of Tax (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 30, 2019	Mar. 31, 2018	Dec. 29, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ 3,067	$ 5,190	$ 3,814
Change in fair value of interest rate swaps, net of taxes	(1,464)	1,832
Fair Value, Option, Changes in Fair Value, Gain (Loss) OCI		456
Cumulative adjustment as a result of ASU 2017-12 adoption	0
Other Comprehensive Income (Loss), Net of Tax	(1,464)	1,832	$ 456
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	$ (1,947)	$ 2,468

Fair Value, Option, Changes in Fair Value, Gain (Loss) OCI

No definition available.

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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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- Definition

Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

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For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings.

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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Amount before tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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