Assets Held For Sale and Sales of Real Estate Narrative (Details) $ in Thousands								3 Months Ended			9 Months Ended
	Sep. 27, 2016 USD ($)	Sep. 26, 2016 USD ($)	Jul. 14, 2016 USD ($)	Jul. 12, 2016 USD ($) property	Jul. 07, 2016 USD ($)	Jun. 02, 2016 USD ($)	May 02, 2016 USD ($)	Sep. 30, 2016 USD ($) property	Jun. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($) property	Sep. 30, 2015 USD ($) property	Dec. 31, 2015 USD ($)	[1]
Long Lived Assets Held-for-sale [Line Items]
Number of real estate properties held for sale (property) | property								8			8
Assets held for sale								$ 17,878			$ 17,878		$ 206,422
Impairment charges								1,000			15,000
Proceeds from sale of real estate								473,000			505,000	$ 5,000
Gain (loss) on sales of real estate								$ 213,168	$ (449)	$ 0	$ 212,719	$ (97)
Number of real estate properties sold (property) | property												2
Deerfield Beach Property
Long Lived Assets Held-for-sale [Line Items]
Proceeds from sale of real estate							$ 24,000
Allentown Property
Long Lived Assets Held-for-sale [Line Items]
Proceeds from sale of real estate						$ 8,000
Seattle Property
Long Lived Assets Held-for-sale [Line Items]
Proceeds from sale of real estate					$ 19,000
Gain (Loss) on sales of real estate, deferred					$ 8,000
Orlando Sentinel Property
Long Lived Assets Held-for-sale [Line Items]
Proceeds from sale of real estate				$ 34,000
Gain (loss) on sales of real estate				$ 2,000
Number of real estate properties sold (property) | property				2
Arlington Heights Property
Long Lived Assets Held-for-sale [Line Items]
Proceeds from sale of real estate			$ 400
Tribune Tower
Long Lived Assets Held-for-sale [Line Items]
Proceeds from sale of real estate		$ 200,000
Gain (loss) on sales of real estate		$ 93,000
Contingency period		5 years
Tribune Tower | Contingent Payment
Long Lived Assets Held-for-sale [Line Items]
Proceeds from sale of real estate		$ 35,000
LA Times Property
Long Lived Assets Held-for-sale [Line Items]
Proceeds from sale of real estate		102,000
Gain (loss) on sales of real estate		$ 59,000
Contingency period		5 years
LA Times Property | Contingent Payment
Long Lived Assets Held-for-sale [Line Items]
Proceeds from sale of real estate		$ 10,000
Olympic Property
Long Lived Assets Held-for-sale [Line Items]
Proceeds from sale of real estate	$ 119,000
Gain (loss) on sales of real estate	$ 59,000

[1] (1) December 31, 2015 balances have been reclassified to present debt issuance costs as a direct deduction from the carrying amount of an associated debt liability in accordance with ASU 2015-03. See Note 1 for further information.