RELATED PARTIES BALANCES AND TRANSCATIONS - Compensation of Key Management Personnel (Details)
|
|
|
|
12 Months Ended |
|
Dec. 31, 2015
shares
|
Jul. 16, 2015
shares
|
Apr. 30, 2015
USD ($)
shares
|
Dec. 31, 2017
USD ($)
shares
|
Dec. 31, 2016
USD ($)
shares
|
Dec. 31, 2015
USD ($)
shares
|
| Disclosure of transactions between related parties [line items] |
|
|
|
|
|
|
| Amount incurred by entity for provision of key management personnel services provided by separate management entity |
|
|
|
$ 4,507,000
|
$ 4,432,000
|
$ 4,211,000
|
| Key management personnel compensation |
|
|
|
$ 4,507,000
|
$ 4,432,000
|
$ 4,211,000
|
| Number of share options granted in share-based payment arrangement (in shares) | shares |
545,649
|
43,857
|
30,000
|
85,000
|
1,003,250
|
|
| Weighted average exercise price of share options granted in share-based payment arrangement (in usd per share) |
|
|
$ 21.01
|
$ 39.69
|
$ 31.89
|
|
| Grant One [Member] |
|
|
|
|
|
|
| Disclosure of transactions between related parties [line items] |
|
|
|
|
|
|
| Number of share options granted in share-based payment arrangement (in shares) | shares |
|
|
|
12,836
|
260,000
|
30,000
|
| Weighted average exercise price of share options granted in share-based payment arrangement (in usd per share) |
|
|
|
$ 34.96
|
$ 29.01
|
$ 22.77
|
| Grant Two [Member] |
|
|
|
|
|
|
| Disclosure of transactions between related parties [line items] |
|
|
|
|
|
|
| Number of share options granted in share-based payment arrangement (in shares) | shares |
|
|
|
62,162
|
82,500
|
273,000
|
| Weighted average exercise price of share options granted in share-based payment arrangement (in usd per share) |
|
|
|
$ 37.00
|
$ 32.36
|
$ 28.31
|