| Date | Acquired | Amount |
|---|---|---|
| Dec 06, 2016 |
|
Undisclosed amount |
| Sep 20, 2011 |
|
$ 30,000,000 |
| Mar 01, 2011 |
|
$ 585,000,000 |
| Nov 04, 2010 |
|
$ 150,000,000 |
| Nov 18, 2009 |
|
$ 300,000,000 |
