Goodwill and Other Intangible Assets - Summary of Goodwill Balances by Component and Segment (Details) $ in Thousands	9 Months Ended
Sep. 30, 2015 USD ($)
Changes in the carrying amount of goodwill
Balance at December 31, 2014	$ 194,197
Purchase price allocation adjustments	627
Foreign currency translation adjustments	(8,505)
Balance at September 30, 2015	186,319
Marketing & Events U.S. Segment
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 September 30, 2015	110,848
Marketing & Events International Segment
Changes in the carrying amount of goodwill
Balance at December 31, 2014	42,221
Purchase price allocation adjustments	397
Foreign currency translation adjustments	(2,905)
Balance at September 30, 2015	39,713
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	(5,600)
Balance at September 30, 2015	$ 35,758

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

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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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