| Dec 31, 2012 | Dec 31, 2013 | Dec 31, 2014 | Dec 31, 2015 | Dec 31, 2016 | Dec 31, 2017 | Dec 31, 2018 | Dec 31, 2019 | Dec 31, 2020 | Dec 31, 2021 | Dec 31, 2022 | Dec 31, 2023 | Dec 31, 2024 |
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| Revenues generated from time charter and voyage charter agreements, recognized over the term of the charter, recorded as service is provided, when they become fixed and determinable. | 386 | 414 | 484 | 490 | 468 | 412 | - | - | - | - | - | 1,502 | 1,850 |
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| Represents voyage revenue from related parties. | - | - | - | - | - | - | - | - | - | - | - | - | 210 |
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| Revenues generated from time charter and voyage charter agreements, including related parties, recognized over the term of the charter, recorded as service is provided, when they become fixed and determinable. | - | - | - | - | - | - | - | - | - | - | - | - | 2,060 |
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| Income from investments in leaseback vessels | - | - | - | - | - | - | - | - | - | - | - | 9 | 24 |
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| Revenues | - | - | - | - | - | - | 380 | 478 | 460 | 794 | 1,114 | 1,511 | 2,084 |
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| Expenses paid to third parties primarily consisting of port, canal and bunker expenses, commissions that are unique to a particular charter and are paid for by the charterer under time charter arrangements or by the company under voyage charter arrangements, and commissions that are paid directly to brokers by the company. | 6 | 3 | 4 | 3 | 2 | 3 | 6 | 5 | 7 | 13 | 49 | 276 | 371 |
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| Amount of expense for charter-in hire. | - | - | - | - | - | - | - | - | - | - | - | - | 707 |
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| Expenses paid to related parties primarily consisting of commissions and fees, which are paid for by the company, regardless of the charter type. | 3 | 3 | 4 | 4 | 4 | 3 | 3 | 5 | 7 | 11 | 15 | 14 | 22 |
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| Vessels' operating expenses | 112 | 116 | 121 | 117 | 106 | 104 | 111 | 116 | 117 | 180 | 269 | 258 | 240 |
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| General and administrative expenses | - | - | - | - | - | 3 | 3 | 3 | 4 | 7 | 10 | 16 | 22 |
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| The total of expenses of managing and administering the affairs of an entity paid to related parties, including affiliates of the reporting entity, which are not directly or indirectly associated with vessel operations. | 1 | 1 | 1 | 11 | 7 | 6 | 6 | 6 | 7 | 10 | 10 | 9 | 11 |
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| Fees paid to related parties for providing the company with technical, crewing, bunkering, accounting, provisions, sale, purchase services, as well as general administrative, certain commercial services, director and officer related insurance services. | 15 | 17 | 18 | 19 | 19 | 19 | 20 | 21 | 22 | 30 | 47 | 56 | 59 |
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| Amortization of deferred drydocking and special survey costs. | 8 | 8 | 8 | 7 | 8 | 8 | 7 | 9 | 9 | 10 | 13 | 20 | 24 |
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| Depreciation | - | - | - | - | - | - | 96 | 113 | 109 | 137 | 166 | 166 | 164 |
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| The difference between the sale price or salvage price and the book value of a vessel that was sold during the reporting period. This element refers to the gain (loss). | 3 | -1 | -3 | -2 | 4 | -5 | -3 | -20 | -79 | 46 | 126 | 112 | 4 |
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| Related to the gain (loss) on assets held for sale. | - | - | - | - | 37 | -2 | -0 | -2 | -8 | - | - | -2 | - |
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| Amount of write-down of vessels recognized in the income statement. | - | - | - | - | - | 18 | - | 3 | 32 | - | 2 | 0 | - |
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| Represents the amount of foreign exchange gains (losses) included in operating income (loss) during the period. | - | - | - | - | - | - | - | -0 | -0 | 0 | 3 | 3 | -5 |
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| Operating income | 155 | 169 | 215 | 218 | 166 | 137 | 117 | 173 | 60 | 441 | 662 | 468 | 462 |
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| Interest income | 1 | 1 | 1 | 1 | 2 | 3 | 3 | 3 | 2 | 2 | 6 | 32 | 33 |
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| Interest and finance costs | 75 | 75 | 96 | 92 | 73 | 70 | 64 | 89 | 69 | 86 | 122 | 144 | 133 |
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| Income from equity method investments | - | 1 | -3 | -1 | -0 | 3 | 12 | 11 | 16 | 13 | 2 | 1 | 0 |
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| Other, net | -0 | 1 | 3 | 0 | 1 | 1 | 0 | 1 | 1 | 5 | 4 | 7 | 3 |
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| Realized losses on FFAs and bunker swaps, net | - | - | - | - | -4 | -1 | -1 | -1 | -2 | -1 | 3 | 17 | -49 |
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| Total other expenses, net | -74 | -66 | -100 | -74 | -84 | -64 | -50 | -74 | -51 | -6 | -108 | -87 | -146 |
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| Net income for the year | - | - | - | - | - | - | - | - | - | - | 555 | 381 | 316 |
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| Comprehensive loss attributable to the non-controlling interest (Notes 16 and 18) | - | - | - | - | - | - | - | - | - | - | -0 | -5 | -4 |
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| Net income | 81 | 103 | 115 | 144 | 82 | 73 | 67 | 99 | 9 | 435 | 555 | 386 | 320 |
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| Less: paid and accrued earnings allocated to Preferred Stock | - | 2 | 12 | 18 | 21 | 21 | 31 | 31 | 31 | 31 | 31 | 31 | 24 |
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| Deemed dividend in redemption of Series E Preferred Stock (Note 17) | - | - | - | - | - | - | - | - | - | - | - | - | 5 |
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| Net income available to common stockholders | - | 102 | 103 | 126 | 61 | 52 | 37 | 68 | -22 | 404 | 524 | 355 | 291 |
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| Earnings per common share, basic and diluted (in dollars per share) | - | - | - | - | - | - | - | - | - | - | 4.26 | 2.95 | 2.44 |
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