| Date | Acquired | Amount |
|---|---|---|
| Jun 15, 2016 |
|
$ 1,360,000,000 |
| Jul 30, 2014 |
|
$ 90,000,000 |
| Feb 03, 2011 |
|
Undisclosed amount |
| Jan 31, 2011 |
|
Undisclosed amount |
| Nov 10, 2009 |
|
Undisclosed amount |
| Nov 25, 2008 |
|
$ 19,300,000 |
| Aug 17, 2004 |
|
Undisclosed amount |
