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Goodwill and Other Assets - Additional Information (Detail) - USD ($)	1 Months Ended
	Feb. 28, 2006	Sep. 30, 2017	Sep. 30, 2016
Schedule Of Goodwill And Other Assets [Line Items]
Goodwill		$ 25,900,000	$ 9,900,000
Corporate Joint Venture [Member]
Schedule Of Goodwill And Other Assets [Line Items]
Acquired certain real estate and assets	$ 4,000,000
Great American Marina [Member] | Corporate Joint Venture [Member]
Schedule Of Goodwill And Other Assets [Line Items]
Acquired certain real estate and assets	11,000,000
Prepaid Expenses and Other Current Assets [Member]
Schedule Of Goodwill And Other Assets [Line Items]
Real estate assets classified as held for sale		$ 0	$ 850,000
Brunswick's Contribution [Member] | Corporate Joint Venture [Member]
Schedule Of Goodwill And Other Assets [Line Items]
Acquired certain real estate and assets	$ 7,000,000

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Schedule of goodwill and other assets.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Carrying amount as of the balance sheet date of investments in land and buildings held for sale, excluding real estate considered to be inventory of the entity.

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-Publisher FASB
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