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7. ACCOUNTS PAYABLE AND ACCRUED EXPENSES | 12 Months Ended
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Dec. 31, 2016
Payables and Accruals [Abstract] |
ACCOUNTS PAYABLE AND ACCRUED EXPENSES (IN THOUSANDS) | Accounts payable and accrued expenses were comprised of the following (in thousands):
|  | December 31, |
|  | 2016 |  |  | 2015 |
Accounts payable |  | $ | 40,952 |  |  | $ | 52,296 |
Accrued expenses |  |  | 42,883 |  |  |  | 32,950 |
Accrued payroll and vacation |  |  | 19,119 |  |  |  | 17,692 |
Accrued professional fees |  |  | 8,212 |  |  |  | 10,875 |
Total |  | $ | 111,166 |  |  | $ | 113,813 |

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