Acquisition of Businesses - Summary of Unaudited Pro forma Results of Operations Attributable to Viad (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Business Combinations [Abstract]
Revenues	$ 236,473	$ 307,802	$ 771,197	$ 823,842
Depreciation and amortization	7,439	8,560	21,818	23,862
Segment operating income	24,624	34,110	48,346	49,931
Net income attributable to Viad	$ 11,855	$ 19,932	$ 26,182	$ 26,916
Diluted net income per share	$ 0.58	$ 0.98	$ 1.29	$ 1.33
Basic net income per share	$ 0.58	$ 0.98	$ 1.29	$ 1.33

The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(2)-(3)

-URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463

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The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

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The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

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Business acquisitions pro forma operating income.

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