Goodwill and Other Intangible Assets - Summary of Goodwill Balances by Component and Segment (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015
Changes in the carrying amount of goodwill
Balance at December 31, 2014	$ 194,197us-gaap_Goodwill
Purchase price allocation adjustments	973us-gaap_GoodwillAcquiredDuringPeriod
Foreign currency translation adjustments	(6,532)us-gaap_GoodwillTranslationAdjustments
Balance at March 31, 2015	188,638us-gaap_Goodwill
Marketing & Events U.S.
Changes in the carrying amount of goodwill
Balance at December 31, 2014	110,618
Purchase price allocation adjustments	762
Foreign currency translation adjustments	0
Balance at March 31, 2015	111,380
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	(2,837)
Balance at March 31, 2015	39,595
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	(3,695)
Balance at March 31, 2015	$ 37,663

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

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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

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-Section 50

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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

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