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Investment in equity securities	3 Months Ended
	Mar. 31, 2018
Investments, All Other Investments [Abstract]
Investment in equity securities	Investment in equity securities On April 14, 2017, the Company invested $2.9 million in a social media analytics company, which is included in investments on its condensed consolidated balance sheets. The Company has elected the measurement alternative for equity investments that do not have readily determinable fair values. The Company did not record an impairment charge on its investment during the three months ended March 31, 2018 or 2017, as there were no significant identified events or changes in circumstances that would be considered an indicator for impairment. Further, there were no observable price changes in orderly transactions for the identical or a similar investment of the same issuer during the three months ended March 31, 2018.

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- Definition

The entire disclosure for investments accounted for under the cost-method. The carrying amount of such investments may be adjusted, for example, distributions in excess of cost (return of capital) or for other-than-temporary impairments. The cost method and lower-of-cost or market, an adaptation of the cost method, is generally followed for most investments in noncontrolled corporations, in some corporate joint ventures, and to a lesser extent in unconsolidated subsidiaries in which the entity does not have the ability to exercise significant influence.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 325
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=75025870&loc=d3e40691-111596

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- References

No definition available.

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