Goodwill and Other Intangible Assets (Details Textual) (USD $)	12 Months Ended			3 Months Ended						12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Marketing & Events U.S [Member]	Dec. 31, 2012 United Kingdom (Melville GES) [Member]	Dec. 31, 2012 GES Canada [Member]	Dec. 31, 2012 Brewster [Member]	Dec. 31, 2012 Glacier Park [Member]	Dec. 31, 2012 Alaska Denali Travel [Member]	Dec. 31, 2012 Customer Contracts [Member]
Indefinite-lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	4 years 9 months 18 days									3 years 8 months 12 days
Segment Reporting Information [Line Items]
Percentage of estimated fair values				126.00%	67.00%	34.00%	58.00%	37.00%	14.00%
Goodwill and Other Intangible Assets (Textual) [Abstract]
Impairment losses			$ 185,000
Intangible asset amortization expense	693,000	772,000	954,000
Cumulative goodwill impairment losses	$ 225,200,000