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Summary of Significant Accounting Policies - Additional Information (Details) $ / shares in Units, $ in Thousands |  |  |  |  |  |  |  |  |  |  |  |  |  | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 10, 2020 $ / shares | Oct. 15, 2019 | Oct. 11, 2019 $ / shares | Jul. 12, 2019 $ / shares | Apr. 12, 2019 $ / shares | Jan. 11, 2019 $ / shares | Oct. 12, 2018 $ / shares | Jul. 13, 2018 $ / shares | Apr. 13, 2018 $ / shares | Jan. 12, 2018 $ / shares | Oct. 13, 2017 $ / shares | Jul. 14, 2017 $ / shares | Apr. 14, 2017 $ / shares | Dec. 31, 2019 USD ($) | Jan. 01, 2020 USD ($) | Jan. 01, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Significant Accounting Policies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock split ratio |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles including goodwill |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 12,100 |  |  | $ 12,100 |
Intangible assets |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,300 |  |  | 4,300 |
Goodwill |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,800 |  |  | 7,800 |
Accumulated amortization of identified intangible assets |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,100 |  |  | 3,000 |
Cash and cash equivalents, restricted cash |  |  |  |  |  |  |  |  |  |  |  |  |  | 25,100 |  |  | 24,100 |
Deferred financing costs |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 24,000 |  |  | 26,400 |
Performance obligation description |  |  |  |  |  |  |  |  |  |  |  |  |  | A membership subscription gives the customer the right to a set schedule of usage at a specified group of Properties. Payments are deferred and recognized on a straight-line basis over the one-year period in which access to Sites at certain Properties are provided. Membership upgrades grant certain additional access rights to the customer and require non-refundable upfront payments. The non-refundable upfront payments are recognized on a straight-line basis over 20 years, which is our estimated membership upgrade contract term. |  |  |  |
Operating loss carryforwards |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 74,100 | $ 74,100
Net investment in real estate U.S federal tax basis |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,700,000 |  |  |  |
Net investment in notes receivable U.S federal tax basis |  |  |  |  |  |  |  |  |  |  |  |  |  | 39,600 |  |  |  |
Quarterly distribution paid per common share (usd per share) | $ / shares |  |  | $ 0.3063 | $ 0.3063 | $ 0.3063 | $ 0.2750 | $ 0.2750 | $ 0.2750 | $ 0.2750 | $ 0.2438 | $ 0.2438 | $ 0.2438 | $ 0.2438 |  |  |  |  |
Right of use asset |  |  |  |  |  |  |  |  |  |  |  |  |  | 15,100 |  |  |  |
Operating lease liability |  |  |  |  |  |  |  |  |  |  |  |  |  | 16,159 |  |  |  |
Cumulative effect of change in accounting principle (ASC 606, Revenue Recognition) |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 154,318 |  |  | $ 211,034 |
ASU 2016-02 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Right of use asset |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 17,500 |  |
Operating lease liability |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 18,700 |  |
2019 Distributions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Quarterly distribution paid per common share (usd per share) | $ / shares |  |  |  |  |  | $ 0.031500 |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Quarterly distribution paid per common share (usd per share) | $ / shares | $ 0.3063 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Quarterly distribution for tax purposes (usd per share) | $ / shares | 0.015462 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event | ASU 2016-13 | Plan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative effect of change in accounting principle (ASC 606, Revenue Recognition) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ (3,900) |  |  |
Subsequent Event | 2019 Distributions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Quarterly distribution paid per common share (usd per share) | $ / shares | $ 0.290788 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Partnership |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership interest (percent) |  |  |  |  |  |  |  |  |  |  |  |  |  | 94.60% |  |  |  |

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