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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 30, 2020
Assets
Accumulated depreciation	$ 149,516	$ 146,583
Accumulated amortization	$ 10,684	$ 9,907
Shareholders' deficit
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	135,000,000	135,000,000
Common stock, shares issued (in shares)	64,200,000	63,962,000
Common stock, shares outstanding (in shares)	64,200,000	63,962,000

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Accumulated amortization of financing lease ROU assets

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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