The number of joint venture sites.

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Proceeds from Equity Investment, Distributions, amount in excess of basis

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Proceeds from Equity Investment, Distributions, including those in excess of basis

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Investment in Unconsolidated Joint Ventures - Additional Information (Detail) $ in Thousands		3 Months Ended		9 Months Ended
	Mar. 29, 2018 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 joint_venture_site	Sep. 30, 2018	Sep. 30, 2018 site	Dec. 31, 2017 USD ($)
Schedule of Equity Method Investments [Line Items]
Number of sites						2		5,941
Economic interest (in percentage)							65.00%
Investment in unconsolidated joint ventures		$ 57,366		$ 57,366					$ 53,080
Joint venture income/(loss)		788	$ 686	3,596	$ 2,876
Income from distribution made to us				3,000	2,700
Distributions, including those in excess of basis				100	600
Crosswinds
Schedule of Equity Method Investments [Line Items]
Economic interest (in percentage)							49.00%
Short term loan repaid	$ 13,800
Various \| Meadows
Schedule of Equity Method Investments [Line Items]
Number of sites \| site								1,077
Economic interest (in percentage)							50.00%
Investment in unconsolidated joint ventures		558		558					307
Joint venture income/(loss)				1,252	1,610
Various \| ECHO JV
Schedule of Equity Method Investments [Line Items]
Number of sites \| site								0
Economic interest (in percentage)							50.00%
Investment in unconsolidated joint ventures		16,076		16,076					15,624
Joint venture income/(loss)				451	231
Florida \| Lakeshore
Schedule of Equity Method Investments [Line Items]
Number of sites \| site								720
Investment in unconsolidated joint ventures		2,278		2,278					2,530
Joint venture income/(loss)				(62)	10
Florida \| Loggerhead
Schedule of Equity Method Investments [Line Items]
Number of sites \| site								2,343
Economic interest (in percentage)							49.00%
Investment in unconsolidated joint ventures		35,205		35,205					31,414
Joint venture income/(loss)				1,089	230
Arizona \| Voyager
Schedule of Equity Method Investments [Line Items]
Number of sites \| site								1,801
Economic interest (in percentage)							50.00%
Investment in unconsolidated joint ventures		$ 3,249		3,249					$ 3,205
Joint venture income/(loss)				$ 866	$ 795
Recreational Vehicle Resort \| Voyager
Schedule of Equity Method Investments [Line Items]
Economic interest (in percentage)							50.00%
Servicing Assets \| Voyager
Schedule of Equity Method Investments [Line Items]
Economic interest (in percentage)							33.00%