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Schedule of Aggregate annual principal maturities of long-term debt (Tables) | 12 Months Ended
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Dec. 31, 2015
Schedule of Aggregate annual principal maturities of long-term debt (Tables): |
Schedule of Aggregate annual principal maturities of long-term debt | Aggregate annual principal maturities of long-term debt at December 31, 2015 are as follows (in thousands):
2016 |  |  | 831 |
2017 |  |  | 187 |
2018 |  |  | 175 |
2019 |  |  | 142 |
2020 |  |  | 127 |
Thereafter |  |  | 580 |
|  | $ | 2,042 |

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