As of December 31, provisions are comprised of the following:
2017 | 2016 | 2015 | ||||||||||
Post-employment benefits | $ | 37,363 | $ | 35,734 | $ | 22,464 | ||||||
Tax liabilities | 5,338 | 4,474 | 5,364 | |||||||||
Other provisions | 28,012 | – | 142,514 | |||||||||
Total provisions | $ | 70,713 | $ | 40,208 | $ | 170,342 |