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Inventories
6 Months Ended
Jun. 30, 2018
Inventory Disclosure [Abstract]  
Inventories:

4.       Inventories:

The amounts shown in the accompanying consolidated balance sheets are analyzed as follows:

       December 31, 2017     June 30, 2018
Lubricants   $ 7,604   $ 8,348
Bunkers     11,741     13,909
Total   $ 19,345   $ 22,257