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17 COMMITMENTS AND CONTINGENCIES - Future minimum rental payments under these lease agreements (Details) | 12 Months Ended
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Dec. 31, 2016 USD ($)
Years ending December 31, (amounts in thousands) |
2017 | $ 251,512
2018 | 112,901
2019 | 79,478
2020 | 18,754
Total | $ 462,645

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