Accumulated Other Comprehensive (Loss) Income (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 28, 2014
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive (loss) income, balance at beginning of the period		$ (71,016)	$ (46,541)
Other comprehensive (loss) income		(10,766)	(24,475)	$ (185,136)
Accumulated other comprehensive (loss) income, balance at the end of the period		$ (81,782)	(71,016)	(46,541)
CareerBuilder, LLC
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Ownership in equity method investment, percent		32.10%
Television Food Network, G.P.
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Ownership in equity method investment, percent		31.30%
Unrecognized Benefit Plan Losses
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive (loss) income, balance at beginning of the period		$ (57,391)	(49,323)
Other comprehensive (loss) income		(7,492)	(8,068)
Accumulated other comprehensive (loss) income, balance at the end of the period		(64,883)	(57,391)	(49,323)
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive (loss) income, balance at beginning of the period		(15,764)	(2,665)
Other comprehensive (loss) income	[1]	(4,210)	(13,099)
Accumulated other comprehensive (loss) income, balance at the end of the period		(19,974)	(15,764)	(2,665)
Foreign Currency Translation Adjustments | CareerBuilder, LLC and Television Food Network G.P.
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other comprehensive (loss) income		(2,000)	(2,000)
Unrecognized Gain on Marketable Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive (loss) income, balance at beginning of the period		2,139	5,447
Other comprehensive (loss) income		936	(3,308)
Accumulated other comprehensive (loss) income, balance at the end of the period		$ 3,075	$ 2,139	$ 5,447

[1] (1)The changes included a loss of $2 million in each of 2016 and 2015, net of taxes, related to the Company’s 32.1% investment interest in CareerBuilder and the Company’s 31.3% investment interest in TV Food Network. See Note 8 for the discussion of the Company’s equity-method investments.