Goodwill and Other Intangible Assets - Summary of Goodwill Balances by Component and Segment (Details) $ in Thousands	6 Months Ended
Jun. 30, 2015 USD ($)
Changes in the carrying amount of goodwill
Balance at December 31, 2014	$ 194,197
Purchase price allocation adjustments	441
Foreign currency translation adjustments	(4,603)
Balance at June 30, 2015	190,035
Marketing & Events U.S.
Changes in the carrying amount of goodwill
Balance at December 31, 2014	110,618
Purchase price allocation adjustments	230
Foreign currency translation adjustments	0
Balance at June 30, 2015	110,848
Marketing & Events International
Changes in the carrying amount of goodwill
Balance at December 31, 2014	42,221
Purchase price allocation adjustments	211
Foreign currency translation adjustments	(1,524)
Balance at June 30, 2015	40,908
Travel & Recreation Group
Changes in the carrying amount of goodwill
Balance at December 31, 2014	41,358
Purchase price allocation adjustments	0
Foreign currency translation adjustments	(3,079)
Balance at June 30, 2015	$ 38,279

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

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-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

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- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of increase (decrease) from foreign currency translation adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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

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-Name Accounting Standards Codification

-Topic 350

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-Section 50

-Paragraph 1

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