| Date | Acquired | Amount |
|---|---|---|
| Feb 01, 2016 |
|
Undisclosed amount |
| Jan 21, 2015 |
|
Undisclosed amount |
| May 25, 2010 |
|
$ 5,500,000 |
| Apr 07, 2008 |
|
$ 8,300,000 |
| Dec 10, 2007 |
|
Undisclosed amount |
