| As at December 31, | |||||||||
| 2017 | 2016 | ||||||||
| Within 1 year | 101,660 | 79,035 | |||||||
| 2-5 years | 231,138 | 290,289 | |||||||
| Thereafter | 2,337,061 | 2,237,645 | |||||||
| 2,669,859 | 2,606,969 | ||||||||
| As at December 31, | |||||||||
| 2017 | 2016 | ||||||||
| Within 1 year | 77,046 | 72,252 | |||||||
| 2-5 years | 231,138 | 290,289 | |||||||
| Thereafter | 2,337,061 | 2,237,645 | |||||||
| 2,645,245 | 2,600,506 | ||||||||