| Date | Acquired | Amount |
|---|---|---|
| Nov 12, 2015 |
|
Undisclosed amount |
| May 07, 2012 |
|
Undisclosed amount |
| Oct 14, 2009 |
|
$ 173,000,000 |
| Jan 25, 2009 |
|
$ 13,200,000 |
| Feb 11, 2008 |
|
$ 18,000,000 |
| Feb 16, 2006 |
|
$ 14,000,000 |
