Pension Benefits - Schedule of Multiemployer Plans (Details) $ in Thousands		1 Months Ended	3 Months Ended																12 Months Ended
		Jul. 29, 2016 USD ($)	Dec. 25, 2016 USD ($) Collective_Bargaining_Agreement		Sep. 25, 2016 USD ($)	[1]	Jun. 26, 2016 USD ($)	[1]	Mar. 27, 2016 USD ($) Collective_Bargaining_Agreement		Dec. 27, 2015 USD ($)		Sep. 27, 2015 USD ($)	[2]	Jun. 28, 2015 USD ($)	[2]	Mar. 29, 2015 USD ($)	[2]	Dec. 25, 2016 USD ($) Collective_Bargaining_Agreement		Dec. 27, 2015 USD ($)		Dec. 28, 2014 USD ($)
Pension Benefits
Multiemployer pension plan withdrawal expense		$ (5,000)	$ 0	[1]	$ (4,971)		$ 11,701		$ 0	[1]	$ 4,358	[2]	$ 0		$ 0		$ 4,697		$ 6,730	[1]	$ 9,055	[2]	$ 0	[1]
Multiemployer plan, withdrawal obligation			$ 113,000								$ 124,000								113,000		124,000
Multiemployer plan, period contributions																			2,670		2,768		2,971
CWA/ITU Negotiated Pension Plan [Member]
Pension Benefits
Multiemployer plan, period contributions	[3]																		486		543		611
Newspaper and Mail Deliverers'-Publishers' Pension Fund [Member]
Pension Benefits
Multiemployer plan, period contributions	[4]																		1,040		1,038		1,102
Number of collective bargaining arrangements | Collective_Bargaining_Agreement									2
GCIU-Employer Retirement Benefit Plan [Member]
Pension Benefits
Multiemployer plan, period contributions	[5]																		$ 43		57		58
Number of collective bargaining arrangements | Collective_Bargaining_Agreement			2																2
Collective bargaining agreement, actuarial calculation, period for smoothing investment losses (in years)																			10 years
Pressmen's Publishers' Pension Fund [Member]
Pension Benefits
Multiemployer plan, period contributions	[6]																		$ 1,001		1,033		1,097
Collective bargaining agreement, actuarial calculation, period for smoothing investment losses (in years)																			10 years
Paper-Handlers' - Publishers' Pension Fund [Member]
Pension Benefits
Multiemployer plan, period contributions	[7]																		$ 100		97		103
Collective bargaining agreement, actuarial calculation, period for smoothing investment losses (in years)																			10 years
Total of Individually Significant Multiemployer Plans [Member]
Pension Benefits
Multiemployer plan, period contributions																			$ 2,670		$ 2,768		$ 2,971

[1] We recorded a charge in the second quarter related to a partial withdrawal obligation under a multiemployer pension plan following an unfavorable arbitration decision, of which $5 million was reimbursed to the Company in the third quarter.

[2] We recorded charges related to partial withdrawal obligations under multiemployer pension plans in the first and fourth quarters.

[3] There are two collective bargaining agreements requiring contributions to this plan, Mailers expire March 30, 2019 and Typographers expired March 30, 2016.

[4] Elections under the Preservation of Access to Care for Medicare Beneficiaries and Pension Relief Act of 2010: Extended Amortization of Net Investment Losses (IRS Section 431(b)(8)(A)) and the Expanded Smoothing Period (IRS Section 431(b)(8)(B)).

[5] We previously had two collective bargaining agreements requiring contributions to this plan. With the sale of the New England Media Group only one collective bargaining agreement remains for the Stereotypers, which expires March 30, 2021. The method for calculating actuarial value of assets was changed retroactive to January 1, 2009, as elected by the Board of Trustees and as permitted by IRS Notice 2010-83. This election includes smoothing 2008 investment losses over ten years.

[6] The Plan sponsor elected two provisions of funding relief under the Preservation of Access to Care for Medicare Beneficiaries and Pension Relief Act of 2010 (PRA 2010) to more slowly absorb the 2008 plan year investment loss, retroactively effective as of April 1, 2009. These included extended amortization under the prospective method and 10-year smoothing of the asset loss for the plan year beginning April 1, 2008.

[7] Board of Trustees elected funding relief. This election includes smoothing the March 31, 2009 investment losses over 10 years.