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Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
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Payables and Accruals [Abstract] |  |
Accrued capital expenditures | $ 85,242 | $ 71,769
Accounts payable and accrued expenses | 34,585 | 32,509
Interest rate swap agreements liability | 5,243 | 436
Accrued interest payable | 4,990 | 5,687
Due to affiliated companies | 616 | 448
Total accounts payable and accrued expenses | $ 130,676 | $ 110,849

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