Investments Career Builder (Details) - CareerBuilder, LLC and Dose Media, LLC - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Schedule of Equity Method Investments [Line Items]
Revenues, net	$ 165,961	$ 182,339	$ 505,383	$ 537,347
Operating (loss) income	(9,661)	26,482	373	70,671
Net income	$ (14,090)	$ 26,396	$ (842)	$ 70,758

Equity Method Investment Summarized Financial Information Income Loss From Continuing Operations, Before Income Taxes and Extraordinary Items

No definition available.

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- Definition

The amount of net income (loss) reported by an equity method investment of the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
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- Definition

The amount of revenue from sale of goods and services reduced by sales returns, allowances, and discounts reported by an equity method investment of the entity.

+ References

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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