Acquisition of Businesses - Narrative (Details) $ in Thousands, € in Millions, £ in Millions									9 Months Ended
	Oct. 05, 2015 EUR (€)	Oct. 05, 2015 USD ($)	Nov. 24, 2014 EUR (€)	Nov. 24, 2014 USD ($)	Oct. 07, 2014 USD ($)	Sep. 16, 2014 GBP (£)	Sep. 16, 2014 USD ($)	Jul. 01, 2014 USD ($)	Sep. 30, 2015 USD ($)	Nov. 24, 2014 USD ($)	Jul. 31, 2014 USD ($)
Business Acquisition [Line Items]
Acquisition adjustment for intangibles									$ 700
Acquisition adjustment for goodwill									(600)
West Glacier, Apgar Village, and other operations
Business Acquisition [Line Items]
Purchase price								$ 16,500
Liability for working capital adjustment											$ 300
Blitz Communication Group Limited
Business Acquisition [Line Items]
Purchase price						£ 15.0	$ 24,416
Acquisition adjustment for property, plant, and equipment									100
Acquisition adjustment for intangibles									16
Acquisition adjustment for accrued dilapidations									200
Acquisition adjustment for deferred taxes									200
Acquisition adjustment for goodwill									21
Goodwill expected to be tax deductible, term of recognition						15 years	15 years
Intangible assets							$ 8,692
Weighted average useful life of intangibles						6 years 10 months 24 days	6 years 10 months 24 days
onPeak LLC
Business Acquisition [Line Items]
Purchase price					$ 42,950
Acquisition adjustment for intangibles									200
Acquisition adjustment for deferred taxes									38
Acquisition adjustment for goodwill									(200)
Goodwill expected to be tax deductible, term of recognition					15 years
Intangible assets					$ 14,100
Weighted average useful life of intangibles					9 years 10 months 24 days
Escrow deposit					$ 4,100
Goodwill deductible					9,300
Travel Planners, Inc
Business Acquisition [Line Items]
Purchase price					$ 33,674
Acquisition adjustment for intangibles									600
Goodwill expected to be tax deductible, term of recognition					15 years
Intangible assets					$ 14,400
Weighted average useful life of intangibles					9 years 9 months 18 days
Escrow deposit					$ 8,800
Working capital adjustment					279
Contingent liability					$ 900
Payable due to tax election									400
Acquisition adjustment for accrued liabilities									100
N200 Limited and Affiliates
Business Acquisition [Line Items]
Purchase price			€ 9.7	$ 12,068
Acquisition adjustment for intangibles									(100)
Acquisition adjustment for deferred taxes									(20)
Acquisition adjustment for goodwill									(300)
Goodwill expected to be tax deductible, term of recognition			15 years	15 years
Intangible assets										$ 3,682
Weighted average useful life of intangibles						7 years 4 months 24 days	7 years 4 months 24 days
Working capital adjustment				$ (458)
Contingent liability | €			€ 1.0
Acquisition adjustment for accrued liabilities									100
Acquisition adjustment for contingent consideration									100
Acquisition adjustment for working capital payable									500
Acquisition adjustment for accounts payable									$ 15
N200 Limited and Affiliates | Subsequent Event
Business Acquisition [Line Items]
Payment of contingent liability	€ 1.0	$ 1,100