| Date | Acquired | Amount |
|---|---|---|
| Jul 18, 2015 |
|
Undisclosed amount |
| Apr 06, 2015 |
|
Undisclosed amount |
| Oct 01, 2014 |
|
Undisclosed amount |
| Oct 01, 2014 |
|
$ 50,000,000 |
| Oct 04, 2011 |
|
Undisclosed amount |
| Oct 12, 2010 |
|
$ 400,000,000 |
| Sep 14, 2010 |
|
Undisclosed amount |
