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Date the declared dividend will be paid, in CCYY-MM-DD format.

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The per share amount of a dividend declared, but not paid, as of the financial reporting date.

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Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding.

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Date the dividend to be paid was declared, in CCYY-MM-DD format.

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Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format.

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No definition available.

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Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.

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Stockholders' Equity (Deficit) - Cash Dividend (Details) - USD ($) $ / shares in Units, $ in Thousands				12 Months Ended
	Feb. 22, 2019	Feb. 11, 2019	Jan. 30, 2019	Dec. 30, 2018	Dec. 31, 2017	Dec. 25, 2016
Cash Dividend
Dividends paid				$ 28,985	$ 30,720	$ 27,896
Subsequent events
Cash Dividend
Quarterly dividend, date of declaration			Jan. 30, 2019
Quarterly dividend declared, per share (in dollars per share)			$ 0.225
Quarterly dividend declared			$ 8,000
Quarterly dividend, date of distribution	Feb. 22, 2019
Quarterly dividend, date of record		Feb. 11, 2019