23. OTHER LONG-TERM LIABILITIES
| As at December 31, | 2017 | 2016 | ||||||
| Deferred revenue | $ | 323,709 | $ | 317,907 | ||||
| Accrued benefit liabilities (Note 29) | 40,065 | 36,718 | ||||||
| Uncertain tax positions | 175 | 175 | ||||||
| Decommissioning liabilities (a) | 1,590 | 1,669 | ||||||
| Other | 340 | 392 | ||||||
| Other long-term liabilities | $ | 365,879 | $ | 356,861 | ||||
| (a) | The current and long-term decommissioning liabilities on property and equipment were $2.8 million (December 31, 2016 — $1.8 million). The decommissioning liabilities are for the restoration of leased buildings and teleports. During the years ended December 31, 2017 and 2016, $0.1 million was recorded as interest expense with no decommissioning liabilities derecognized. It is expected that the decommissioning liabilities will mature between 2018 and 2062. |