| | December 31, | | |||||||
| | 2017 | | 2016 | | 2015 | | |||
Deferred tax assets | | | | | | | | | | |
Accounts payable | | $ | 16,404 | | | 831 | | | 764 | |
Employee benefits | | | 45,519 | | | 42,221 | | | 32,572 | |
PTU payable | | | 12,917 | | | 12,700 | | | 9,516 | |
Accounts receivable | | | - | | | - | | | 404 | |
Tax loss carryforwards | | | - | | | 2,760 | | | 10,236 | |
Property, plant and equipment | | | - | | | - | | | 490 | |
Other provisions | | | 7,025 | | | 1,754 | | | 239 | |
Total deferred tax assets | | | 81,865 | | | 60,266 | | | 54,221 | |
| | | | | | | | | | |
Deferred tax liabilities | | | | | | | | | | |
Property, plant and equipment | | | 59 | | | 82 | | | - | |
Prepaid expenses | | | 1,136 | | | 52 | | | 94 | |
Total deferred tax liabilities | | | 1,195 | | | 134 | | | 94 | |
Net deferred tax assets | | | 80,670 | | | 60,132 | | | 54,127 | |
| | December 31, | | |||||||
| | 2017 | | 2016 | | 2015 | | |||
Deferred tax assets | | | | | | | | | | |
Accounts payable | | $ | 1,170,771 | | | 964,676 | | | 1,093,145 | |
Tax loss carryforwards | | | 22,013 | | | 676 | | | 1,081 | |
Goodwill | | | 7,562 | | | 19,846 | | | 22,326 | |
Other provisions | | | 54,020 | | | 24,049 | | | 6,606 | |
Derivative financial instruments | | | - | | | - | | | 859 | |
Total deferred tax assets | | | 1,254,366 | | | 1,009,247 | | | 1,124,017 | |
| | | | | | | | | | |
Deferred tax liabilities | | | | | | | | | | |
Inventories | | | 1,601,498 | | | 1,612,890 | | | 1,400,793 | |
Accounts receivable | | | 421,191 | | | 438,146 | | | 382,585 | |
Property, plant and equipment | | | 2,428,358 | | | 2,566,002 | | | 2,356,509 | |
Prepaid expenses | | | 392,800 | | | 302,958 | | | 353,166 | |
Derivative financial instruments | | | 253,898 | | | 1,826 | | | - | |
Total deferred tax liabilities | | | 5,097,745 | | | 4,921,822 | | | 4,493,053 | |
Net deferred tax liability | | $ | 3,843,379 | | | 3,912,575 | | | 3,369,036 | |