Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands		3 Months Ended
Dec. 26, 2018	Mar. 26, 2019
Accounting pronouncements
Lease liability		$ 522,928
Cumulative effect on retained earnings	$ 2,700
ASU 2016-02 (Topic 842)
Accounting pronouncements
Cumulative effect on retained earnings		$ (2,678)

Amount of the cumulative effect on retained earnings net of related income tax effect.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22663-107794

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- Definition

Present value of lessee's discounted obligation for lease payments from operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977

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