The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585

Name:	us-gaap_RepaymentsOfLongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Debt and Capital Leases - Narrative (Details) - USD ($) $ in Thousands		9 Months Ended
	Sep. 26, 2017	Sep. 23, 2017	Sep. 24, 2016
Debt Instrument [Line Items]
Principal repayments		$ 4,398	$ 66,831
Credit Facility
Debt Instrument [Line Items]
Principal repayments		$ 4,200
Credit Facility \| Subsequent Event
Debt Instrument [Line Items]
Principal repayments	$ 268,000