Pension Benefits - Schedule of Multiemployer Plans (Details)	1 Months Ended	3 Months Ended								12 Months Ended
	Jul. 29, 2016 USD ($)	Dec. 30, 2018 USD ($) Collective_Bargaining_Agreement	Sep. 30, 2018 USD ($)	Jul. 01, 2018 USD ($)	Apr. 01, 2018 USD ($)	Dec. 31, 2017 USD ($)	Sep. 24, 2017 USD ($)	Jun. 25, 2017 USD ($)	Mar. 26, 2017 USD ($)	Dec. 30, 2018 USD ($) Collective_Bargaining_Agreement	Dec. 31, 2017 USD ($)	Dec. 25, 2016 USD ($)
Pension Benefits
Multiemployer pension plan withdrawal expense	$ 5,000,000											$ 6,700,000
Multiemployer Plans, Gain (Loss) On Withdrawal Obligation		$ 0	$ (4,851,000)	$ 0	$ 0	$ 4,320,000	$ 0	$ 0	$ 0	$ 4,851,000	$ 4,320,000	(6,730,000)
Pension Plan [Member]
Pension Benefits
Multiemployer pension plan withdrawal expense											0	6,700,000
Multiemployer plan, withdrawal obligation		$ 97,000,000				$ 108,000,000				97,000,000	108,000,000
Multiemployer plan, period contributions										2,670,000	2,510,000	2,670,000
Pension Plan [Member] | Paper-Handlers' - Publishers' Pension Fund [Member]
Pension Benefits
Multiemployer plan, period contributions										$ 99,000	88,000	100,000
Collective bargaining agreement, actuarial calculation, period for smoothing investment losses (in years)										10 years
Pension Plan [Member] | Pressmen's Publishers' Pension Fund [Member]
Pension Benefits
Multiemployer plan, period contributions										$ 1,129,000	963,000	1,001,000
Collective bargaining agreement, actuarial calculation, period for smoothing investment losses (in years)										10 years
Pension Plan [Member] | GCIU-Employer Retirement Benefit Plan [Member]
Pension Benefits
Multiemployer plan, period contributions										$ 42,000	39,000	43,000
Collective bargaining agreement, actuarial calculation, period for smoothing investment losses (in years)										10 years
Pension Plan [Member] | Newspaper and Mail Deliverers'-Publishers' Pension Fund [Member]
Pension Benefits
Multiemployer plan, period contributions										$ 992,000	995,000	1,040,000
Number of collective bargaining arrangements | Collective_Bargaining_Agreement		2								2
Pension Plan [Member] | CWAITU Negotiated Pension Plan [Member]
Pension Benefits
Multiemployer plan, period contributions										$ 408,000	425,000	486,000
Pension Plan [Member] | Total of Individually Significant Multiemployer Plans [Member]
Pension Benefits
Multiemployer plan, period contributions										$ 2,670,000	$ 2,510,000	$ 2,670,000