Consolidated Statements of Comprehensive Income Unaudited (Parenthetical) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 25, 2016	Sep. 27, 2015	Sep. 25, 2016	Sep. 27, 2015
Consolidated Statements of Comprehensive Income (Unaudited)
Net interest expense	$ 1,756	$ 1,180	$ 4,876	$ 3,576
Income tax effects	8,977	7,281	33,423	24,541
Qualifying as hedges \| Interest rate swap \| Amount reclassified from AOCI
Consolidated Statements of Comprehensive Income (Unaudited)
Net interest expense	296	390	924	1,177
Income tax effects	$ 110	$ 145	$ 342	$ 436

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 9
-Subparagraph (a),(b)
-URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32639-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Income Tax Expense (or Benefit)
-URI http://asc.fasb.org/extlink&oid=6515339

Name:	us-gaap_IncomeTaxExpenseBenefit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration