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CASH FLOW INFORMATION - Non-cash (Details) - USD ($) $ in Thousands | 6 Months Ended
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Jun. 30, 2020 | Jun. 30, 2019
Non-cash investing and financing activities |  |
Cash paid for interest | $ 10,457 | $ 14,946
Cash paid for estimated income taxes | 0 | 0
Reclassification from vessels to vessels held for sale | 23,252 |
Accounts payable and accrued expenses |  |
Non-cash investing and financing activities |  |
Purchase of scrubbers | 33 | 4,104
Purchases of vessels and ballast water treatment systems | 1,726 | 2,383
Purchase of other fixed assets | 490 | $ 77
Non-cash financing activities net proceeds from sale of assets | 13 |
Non-cash financing activities cash dividends paid | 103 |
Non-cash financing activities for deferred financing costs | $ 179 |

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