Acquisition of Businesses - Schedule of Recognized Assets Acquired and Liabilities Assumed (Details) CAD in Millions					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, 2015 USD ($)	Dec. 31, 2015 USD ($)
Business Acquisition [Line Items]
Excess purchase price over fair value of net assets acquired (“goodwill”)					$ 222,896,000		$ 185,223,000
Purchase price, net of cash acquired					145,735,000	$ 430,000
Maligne Tours Ltd
Business Acquisition [Line Items]
Cash			$ 14,962,000	CAD 20.9
Inventories			246,000
Prepaid expenses			2,000
Property and equipment			4,133,000
Intangible assets			9,244,000
Total assets acquired			13,625,000
Customer deposits			15,000
Total liabilities assumed			15,000
Total fair value of net assets acquired			13,610,000
Excess purchase price over fair value of net assets acquired (“goodwill”)			$ 1,352,000
CATC Alaska Tourism Corporation
Business Acquisition [Line Items]
Cash		$ 45,000,000
Working capital		(35,000)
Accounts receivable		8,000
Inventories		921,000
Prepaid expenses		82,000
Property and equipment		43,470,000
Intangible assets		980,000
Total assets acquired		45,461,000
Accounts payable		306,000			$ 100,000
Accrued liabilities		434,000
Customer deposits		1,952,000
Total liabilities assumed		2,692,000
Total fair value of net assets acquired		42,769,000
Cash acquired		(2,196,000)
Purchase price, net of cash acquired		$ 42,769,000
ON Event Services LLC
Business Acquisition [Line Items]
Cash	$ 87,000,000
Working capital adjustment	972,000
Contingent consideration	540,000
Accounts receivable	4,813,000
Inventories	270,000
Prepaid expenses	974,000
Property and equipment	14,827,000
Intangible assets	33,340,000
Total assets acquired	54,224,000
Accounts payable	879,000
Accrued liabilities	472,000
Customer deposits	851,000
Other liabilities	274,000
Total liabilities assumed	2,476,000
Total fair value of net assets acquired	51,748,000
Excess purchase price over fair value of net assets acquired (“goodwill”)	36,764,000
Purchase price, net of cash acquired	$ 88,512,000