Acquisition of Businesses - Narrative (Details) CAD in Millions					3 Months Ended	9 Months Ended
	Aug. 11, 2016 USD ($)	Mar. 11, 2016 USD ($)	Jan. 04, 2016 USD ($)	Jan. 04, 2016 CAD	Sep. 30, 2016 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)
Maligne Tours Ltd
Business Acquisition [Line Items]
Business acquisition date						Jan. 04, 2016
Purchase price			$ 14,962,000	CAD 20.9
Acquisition related costs						$ 100,000	$ 200,000
Intangible assets			$ 9,244,000
Weighted average useful life of intangibles			26 years 8 months 12 days	26 years 8 months 12 days
Revenue					$ 4,700,000	6,300,000
Operating income (losses)					2,400,000	$ 2,300,000
Maligne Tours Ltd | Parks Canada
Business Acquisition [Line Items]
Operating licenses amortized period			29 years	29 years
CATC Alaska Tourism Corporation
Business Acquisition [Line Items]
Business acquisition date						Mar. 11, 2016
Purchase price		$ 45,000,000
Acquisition related costs						$ 100,000	$ 600,000
Intangible assets		$ 980,000
Weighted average useful life of intangibles		5 years 9 months 18 days
Revenue					18,700,000	28,100,000
Operating income (losses)					8,000,000	8,900,000
Percentage of equity interest		100.00%
Working capital receivable						89,000
Accounts payable		$ 306,000			100,000	100,000
Acquisition adjustment for accrued liabilities						$ 16,000
ON Event Services LLC
Business Acquisition [Line Items]
Business acquisition date						Aug. 11, 2016
Purchase price	$ 87,000,000
Acquisition related costs						$ 800,000
Intangible assets	$ 33,340,000
Weighted average useful life of intangibles	10 years 4 months 24 days
Revenue					7,800,000
Operating income (losses)					$ 500,000
Accounts payable	$ 879,000
Contingent liability	5,500,000
Estimated fair value of Earnout	540,000
Goodwill expected to be tax deductible, term of recognition						15 years
ON Event Services LLC | Maximum
Business Acquisition [Line Items]
Aggregate purchase price	$ 92,500,000