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Interest and Finance Costs: | 12 Months Ended
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Dec. 31, 2017
Interest and Finance Costs |
Interest and Finance Costs: | 11. Interest and Finance Costs: The amounts in the accompanying consolidated statements of income are analyzed as follows:
| Year ended December 31,
|  | 2017 |  | 2016 |  |  | 2015
Interest expense (Note 5) | $ | 39,775 |  | $ | 32,887 |  | $ | 25,926
Amortization and write-off of deferred financing fees |  | 5,387 |  |  | 1,984 |  |  | 1,545
Commitment fees (Note 5) |  | — |  |  | 2 |  |  | 15
Other |  | 1,119 |  |  | 118 |  |  | 488
Total | $ | 46,281 |  | $ | 34,991 |  | $ | 27,974

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