Consolidated Statements of Changes in Equity $ in Thousands |
Share capital [Member]
USD ($)
shares
|
Share option reserve [Member]
USD ($)
|
Reserves [Member]
USD ($)
|
Accumulated other comprehensive loss [Member]
USD ($)
|
Retained earnings [Member]
USD ($)
|
Total equity attributable to the equity holders of the Company [Member]
USD ($)
|
Non-controlling interests [Member]
USD ($)
|
USD ($)
shares
|
|---|---|---|---|---|---|---|---|---|
| Balance at Mar. 31, 2016 | $ 230,933 | $ 12,628 | $ 25,409 | $ (35,994) | $ 562 | $ 233,538 | $ 53,021 | $ 286,559 |
| Balance, Shares at Mar. 31, 2016 | shares | 166,846,356 | |||||||
| Options exercised | $ 1,222 | (318) | 904 | $ 904 | ||||
| Options exercised, Shares | shares | 1,043,280 | (1,043,280) | ||||||
| Share-based compensation | 1,015 | 1,015 | $ 1,015 | |||||
| Dividends declared | (1,585) | (1,585) | (1,585) | |||||
| Distribution to non-controlling interests | (7,090) | (7,090) | ||||||
| Comprehensive income | (14,425) | 43,674 | 29,249 | 8,883 | 38,132 | |||
| Balance at Mar. 31, 2017 | $ 232,155 | 13,325 | 25,409 | (50,419) | 42,651 | 263,121 | 54,814 | 317,935 |
| Balance, Shares at Mar. 31, 2017 | shares | 167,889,636 | |||||||
| Options exercised | $ 751 | (201) | 550 | $ 550 | ||||
| Options exercised, Shares | shares | 857,020 | (857,020) | ||||||
| Share-based compensation | 1,566 | 1,566 | $ 1,566 | |||||
| Dividends declared | (3,362) | (3,362) | (3,362) | |||||
| Distribution to non-controlling interests | (2,917) | (2,917) | ||||||
| Common shares repurchased as part of normal course issuer bid | $ (4,177) | (4,177) | $ (4,177) | |||||
| Common shares repurchased as part of normal course issuer bid, Shares | shares | (1,717,100) | 1,717,100 | ||||||
| Comprehensive income | 24,544 | 46,994 | 71,538 | 17,046 | $ 88,584 | |||
| Balance at Mar. 31, 2018 | $ 228,729 | $ 14,690 | $ 25,409 | $ (25,875) | $ 86,283 | $ 329,236 | $ 68,943 | $ 398,179 |
| Balance, Shares at Mar. 31, 2018 | shares | 167,029,556 |