Condensed Consolidated Statements of Stockholders' Equity (Parenthetical) - USD ($) $ in Thousands	6 Months Ended
Jul. 02, 2016	Jul. 04, 2015
Statement of Stockholders' Equity [Abstract]
Dividends paid to stockholders, per share (in dollars per share)	$ 0.32	$ 0.32
Stock options exercised, tax benefit	$ 299	$ 659

Amount of deferred tax expense from write-off of the deferred tax asset related to deductible stock options at exercise.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 20
-Section 55
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=32706628&loc=d3e11283-113907

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