Aggregate dividends paid during the period for each share of common stock outstanding.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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Aggregate dividends declared during the period for each share of common stock outstanding.

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586

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Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.

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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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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Stockholders' Equity (Dividend) (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended			6 Months Ended
	Jul. 31, 2018	Jul. 01, 2018	Apr. 01, 2018	Jun. 25, 2017	Jul. 01, 2018	Jun. 25, 2017
Dividends Payable [Line Items]
Common stock, dividends, per share, cash paid		$ 0.09	$ 0.09		$ 0.18
Dividends, common stock, cash		$ 8,363	$ 8,371		$ 16,734	$ 16,308
Common stock, dividends per share		$ 0.09		$ 0.08	$ 0.18	$ 0.16
Subsequent event [Member]
Dividends Payable [Line Items]
Common stock, dividends per share	$ 0.09
Dividends payable, date to be paid	Aug. 22, 2018
Dividends payable, date of record	Aug. 09, 2018