Change in Number of BSAX Outstanding
| Year ended December 31, | ||||||||||||
| Number of BSAX | 2015 | 2016 | 2017 | |||||||||
|
Balance at beginning of period |
2,131 | 1,036 | 1,036 | |||||||||
|
Granted during the period |
— | — | — | |||||||||
|
Forfeited during the period |
— | — | — | |||||||||
|
Exercised during the period |
1,095 | — | 1,036 | |||||||||
|
Expired during the period |
— | — | — | |||||||||
|
Balance at end of period |
1,036 | 1,036 | — | |||||||||