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Other Investments (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 1 Months Ended | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Feb. 27, 2020 | Mar. 31, 2024 | Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023 | May 15, 2023
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Equity method investment |  |  | $ 108,106 |  | $ 108,106 |  | $ 113,304 |
Investment (losses) earnings in an investee |  |  | (2,716) | $ 517 | (8,054) | $ (3,704) |  |
Capital contribution funded |  |  |  |  | 3,392 | 0 |  |
TravelCenters of America Inc. | BP Products North America Inc. |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Business acquisition, share price (in dollars per share) |  |  |  |  |  |  |  | $ 86.00
Travel Centers of America |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Number of common shares owned (in shares) |  |  |  |  |  |  |  | 1,184,797
Percentage of total shares outstanding (in percent) |  |  |  |  |  |  |  | 7.80%
Sonesta Int'l Hotels Corp |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Investment (losses) earnings in an investee |  |  | (2,716) | 517 | (8,054) | (3,704) |  |
Decrease in hotel operating expense |  |  | 621 | 621 | 1,242 | 1,242 |  |
Capital contribution funded |  | $ 3,392 |  |  |  |  |  |
Travel Centers of America |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Historical cost of securities |  |  |  |  |  |  | 24,418 | $ 24,418
Carrying value of investment |  |  |  |  |  |  |  | $ 101,893
(Loss) gain on equity securities |  |  |  | (593) |  | 48,837 |  |
Sonesta agreements |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Equity method investment |  |  | 108,106 |  | 108,106 |  | 113,304 |
Amount of cost basis exceeding book value | $ 8,000 |  |  |  |  |  |  |
Amortization period | 31 years |  |  |  |  |  |  |
Amortization of basis difference |  |  | 65 | $ 65 | 130 | $ 130 |  |
Accounts payable and other liabilities |  |  | 42,000 |  | 42,000 |  |  |
Unamortized balance |  |  | $ 31,237 |  | $ 31,237 |  | $ 32,479 |
Sonesta Int'l Hotels Corp |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Noncontrolling interest, ownership percentage (in percent) |  |  | 34.00% |  | 34.00% |  | 34.00% |

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