Business Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 29, 2015	Mar. 30, 2014	Dec. 28, 2014
Segment Reporting Information [Line Items]
Operating revenues	$ 472,737us-gaap_SalesRevenueNet	$ 446,102us-gaap_SalesRevenueNet
Operating profit (loss)	60,935us-gaap_OperatingIncomeLoss	50,260us-gaap_OperatingIncomeLoss
Depreciation	17,054us-gaap_Depreciation	16,711us-gaap_Depreciation
Amortization	47,771	60,674
Capital expenditures	16,299	17,601
Total Assets	10,960,603us-gaap_Assets		11,396,455us-gaap_Assets
Assets held for sale	507		5,645
Operating Segments \| Television and Entertainment
Segment Reporting Information [Line Items]
Operating revenues	410,300	400,201
Operating profit (loss)	79,348	64,697
Depreciation	11,423	12,376
Amortization	41,510	56,655
Total Assets	8,099,139		8,234,456
Operating Segments \| Digital and Data
Segment Reporting Information [Line Items]
Operating revenues	50,202	31,485
Operating profit (loss)	3,734	(2,086)
Depreciation	2,105	1,813
Amortization	6,261	4,019
Total Assets	638,195		644,985
Corporate and Other
Segment Reporting Information [Line Items]
Operating revenues	12,235	14,416
Operating profit (loss)	(22,147)	(12,351)
Depreciation	3,526	2,522
Total Assets	2,222,762		2,511,369
Continuing operations \| Operating Segments \| Television and Entertainment
Segment Reporting Information [Line Items]
Capital expenditures	9,250	3,029
Continuing operations \| Operating Segments \| Digital and Data
Segment Reporting Information [Line Items]
Capital expenditures	2,605	1,921
Continuing operations \| Corporate and Other
Segment Reporting Information [Line Items]
Capital expenditures	4,444	11,307
Discontinued operations
Segment Reporting Information [Line Items]
Capital expenditures	$ 0	$ 1,344

Amortization Of Intangible Assets, Excluding Contract Intangible Assets

No definition available.

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- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 12

-Article 7

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- Definition

Amount of assets held-for-sale that are not part of a disposal group.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 15

-Paragraph 4

-Subparagraph (b)(2)

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- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

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- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

No definition available.

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- Definition

The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

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-Name Accounting Standards Codification

-Topic 230

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-Section 45

-Paragraph 13

-Subparagraph (c)

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- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

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