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Investment in Real Estate - Additional Information (Detail) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 USD ($) site | Dec. 31, 2016 USD ($) property site | Dec. 31, 2015 USD ($) site
Real Estate Properties [Line Items] |  |  |
Number of properties acquired | property |  | 4 |
Number of sites acquired | site | 1,870 | 2,377 |
Purchase price of the property | $ 142,400 | $ 120,500 |
Long-term Debt | 2,200,017 |  |
Mortgage debt assumed | 5,900 | 22,600 |
Unamortized discount (premium) | 3,253 |  |
R V Resort |  |  |
Real Estate Properties [Line Items] |  |  |
Number of sites acquired | site |  |  | 731
Purchase price of the property |  |  | $ 23,900
Paradise Park Largo |  |  |
Real Estate Properties [Line Items] |  |  |
Debt assumed for the purchase of property | $ 5,900 |  |
Forest Lake Estates | Zephryhills, Florida |  |  |
Real Estate Properties [Line Items] |  |  |
Debt assumed for the purchase of property |  | $ 22,600 |

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