Share Capital - Shares of Common Stock (Details) |
9 Months Ended |
|---|---|
|
Sep. 30, 2015
shares
| |
| Increase (Decrease) in Common Stock | |
| Beginning balance | 276,072,351 |
| Options exercised | 240,000 |
| Ending balance | 274,814,539 |
| Common Stock [Member] | |
| Increase (Decrease) in Common Stock | |
| Beginning balance | 276,072,351 |
| Options exercised | 240,000 |
| Shares repurchased and canceled | (3,000,796) |
| Exchange of exchangeable shares | 1,502,995 |
| Shares canceled | (11) |
| Ending balance | 274,814,539 |
| Common Stock [Member] | Gran Tierra Exchangeco Inc [Member] | |
| Increase (Decrease) in Common Stock | |
| Beginning balance | 5,595,118.000 |
| Options exercised | 0 |
| Shares repurchased and canceled | 0 |
| Exchange of exchangeable shares | (617,257) |
| Shares canceled | (84) |
| Ending balance | 4,977,777 |
| Common Stock [Member] | Gran Tierra Goldstrike Inc [Member] | |
| Increase (Decrease) in Common Stock | |
| Beginning balance | 4,524,627 |
| Options exercised | 0 |
| Shares repurchased and canceled | 0 |
| Exchange of exchangeable shares | (885,738) |
| Shares canceled | 0 |
| Ending balance | 3,638,889 |