Contingencies (Details) - Shareholder class action lawsuits - item |
Aug. 30, 2013 |
May. 10, 2013 |
Mar. 31, 2016 |
|---|---|---|---|
| Contingencies | |||
| Number of notices of actions relating to Canadian securities class action claims | 3 | ||
| Number of actions were succeeded by specific action with an amended claim | 3 | ||
| Number of actions by which specific Ontario actions were succeeded | 1 | ||
| Number of pending matters having material adverse impact on financial position or results of operations or have been reserved | 0 |