| | 2017 | | 2016 | | 2015 | | |||
Current service cost | | $ | 28,968 | | | 29,604 | | | 26,836 | |
Interest cost, net | | | 16,828 | | | 9,207 | | | 6,702 | |
| | $ | 45,796 | | | 38,811 | | | 33,538 | |