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Investment in Real Estate - Additional Information (Detail) $ in Millions | 12 Months Ended
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Dec. 31, 2018 USD ($) property land site | Dec. 31, 2017 USD ($) site | Dec. 31, 2016 USD ($) property site
Real Estate Properties [Line Items] |  |  |
Number of properties acquired | property |  |  | 4
Asset acquisition, consideration transfered | $ 251.7 |  |
Capitalized transaction costs | $ 5.8 |  |
Number of sites acquired | site | 3,712 | 1,870 | 2,377
Long-term debt assumed | $ 9.2 |  |
Asset acquisition, liabilities incurred | $ 8.8 |  |
Purchase price of the property |  | $ 142.4 | $ 120.5
Mortgage debt assumed |  | $ 5.9 | $ 22.6
R V Resort |  |  |
Real Estate Properties [Line Items] |  |  |
Number of properties acquired | property | 4 |  |
Manufactured homes |  |  |
Real Estate Properties [Line Items] |  |  |
Number of properties acquired | property | 4 |  |
Vacant Land |  |  |
Real Estate Properties [Line Items] |  |  |
Asset acquisition, consideration transfered | $ 2.8 |  |
Number of assets acquired | land | 2 |  |

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