Revenue - Advertising Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
Apr. 01, 2018	Mar. 26, 2017
Disaggregation of Revenue [Line Items]
Advertising revenue	$ 413,948	$ 398,804
Display
Disaggregation of Revenue [Line Items]
Advertising revenue	109,505	114,603
Classified and Other
Disaggregation of Revenue [Line Items]
Advertising revenue	16,142	15,425
Total advertising
Disaggregation of Revenue [Line Items]
Advertising revenue	125,647	130,028
Print \| Display
Disaggregation of Revenue [Line Items]
Advertising revenue	70,805	71,627
Print \| Classified and Other
Disaggregation of Revenue [Line Items]
Advertising revenue	8,139	8,730
Print \| Total advertising
Disaggregation of Revenue [Line Items]
Advertising revenue	78,944	80,357
Digital \| Display
Disaggregation of Revenue [Line Items]
Advertising revenue	38,700	42,976
Digital \| Classified and Other
Disaggregation of Revenue [Line Items]
Advertising revenue	8,003	6,695
Digital \| Total advertising
Disaggregation of Revenue [Line Items]
Advertising revenue	$ 46,703	$ 49,671

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 32
-Paragraph 2A
-URI http://asc.fasb.org/extlink&oid=82859839&loc=SL82860478-203043

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130543-203045

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130539-203045

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130545-203045

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