| Date | Acquired | Amount |
|---|---|---|
| Dec 09, 2013 |
|
$ 50,000,000 |
| Sep 04, 2013 |
|
Undisclosed amount |
| Oct 23, 2012 |
|
$ 30,000,000 |
| Jan 03, 2012 |
|
Undisclosed amount |
| May 23, 2011 |
|
Undisclosed amount |
