Unaudited Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net Income	$ (8,420)	$ 15,055	$ 28,849	$ 43,158
Other comprehensive income:
Unrealized changes in fair value of interest rate swaps, net of income taxes of $(34), $17, $(155) and $107, respectively	(107)	112	(485)	343
Foreign currency translation adjustments	(185)	589	7	764
Total other comprehensive income	(292)	701	(478)	1,107
Total comprehensive income	$ (8,712)	$ 15,756	$ 28,371	$ 44,265

Other comprehensive income loss unrealized changes in fair value of Interest Rate Swaps, net of Income taxes.

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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

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