Investment in Unconsolidated Joint Ventures - Summary of Unconsolidated Investments (Details) $ in Thousands	12 Months Ended
Dec. 31, 2017 USD ($) site	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Schedule of Equity Method Investments [Line Items]
Number of Sites(d) \| site	5,941
Investment in unconsolidated joint ventures	$ 53,080	$ 19,369
Equity in income of unconsolidated joint ventures	$ 3,765	2,605	$ 4,089
Meadows Investments \| Other Regions
Schedule of Equity Method Investments [Line Items]
Number of Sites(d) \| site	1,077
Economic Interest (in percentage)	50.00%
Investment in unconsolidated joint ventures	$ 307	510
Equity in income of unconsolidated joint ventures	$ 2,197	1,348	1,401
Lakeshore Investments \| Florida
Schedule of Equity Method Investments [Line Items]
Number of Sites(d) \| site	720
Investment in unconsolidated joint ventures	$ 2,530	56
Equity in income of unconsolidated joint ventures	$ 115	318	1,777
Voyager Investments \| Arizona
Schedule of Equity Method Investments [Line Items]
Number of Sites(d) \| site	1,801
Economic Interest (in percentage)	50.00%
Investment in unconsolidated joint ventures	$ 3,205	3,376
Equity in income of unconsolidated joint ventures	$ 891	1,014	846
Loggerhead \| Other Regions
Schedule of Equity Method Investments [Line Items]
Number of Sites(d) \| site	2,343
Economic Interest (in percentage)	49.00%
Investment in unconsolidated joint ventures	$ 31,414	0
Equity in income of unconsolidated joint ventures	$ 230	0	0
ECHO Financing \| Other Regions
Schedule of Equity Method Investments [Line Items]
Number of Sites(d) \| site	0
Economic Interest (in percentage)	50.00%
Investment in unconsolidated joint ventures	$ 15,624	15,427
Equity in income of unconsolidated joint ventures	$ 332	$ (75)	$ 65
Servicing Assets \| Voyager Investments
Schedule of Equity Method Investments [Line Items]
Economic Interest (in percentage)	33.00%
Recreational Vehicle Resort \| Voyager Investments
Schedule of Equity Method Investments [Line Items]
Economic Interest (in percentage)	50.00%

The number of joint venture sites.

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571

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- Definition

This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(12))
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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

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- Definition

Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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