Acquisitions (Narrative) (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended		1 Months Ended
Feb. 29, 2012 Skiinfo [Member]	Jan. 31, 2012 Skiinfo [Member]	Apr. 30, 2012 Kirkwood Mountain Resort [Member]	Apr. 11, 2012 Kirkwood Mountain Resort [Member]
Effective date of business acquisition	Feb. 01, 2012		Apr. 12, 2012
Purchase price allocation to goodwill		$ 1.8
Purchase price allocation to indefinite-lived intangible assets		0.7		0.8
Purchase price allocation to fixed assets		2.4		16.8
Purchase price allocation to other assets		2.7		2.5
Purchase price allocation to amortizable intangible assets		0.5		1.2
Weighted-average amortization period (in years)	6 years 8 months 12 days		21 years 6 months 16 days
Purchase price allocation to liabilities assumed		2.6		3.1
Payments to Acquire Businesses, Net of Cash Acquired	$ 5.7		$ 18.2

Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format.

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The amount of acquisition cost of a business combination allocated to an identifiable intangible asset that will be amortized.

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Amount of goodwill arising from a business combination, which is the excess of the cost of the acquired entity over the amounts assigned to assets acquired and liabilities assumed.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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