| Date | Acquired | Amount |
|---|---|---|
| Oct 31, 2017 |
|
Undisclosed amount |
| Oct 13, 2017 |
|
Undisclosed amount |
| Dec 16, 2016 |
|
$ 88,500,000 |
| Oct 24, 2016 |
|
Undisclosed amount |
| Apr 13, 2016 |
|
Undisclosed amount |
| Sep 14, 2015 |
|
$ 122,000,000 |
| Sep 02, 2015 |
|
Undisclosed amount |
| Feb 02, 2015 |
|
$ 2,700,000,000 |
| Dec 02, 2014 |
|
$ 95,000,000 |
| Jun 27, 2012 |
|
Undisclosed amount |
| Mar 11, 2011 |
|
Undisclosed amount |
| Jan 04, 2010 |
|
Undisclosed amount |
| Nov 20, 2009 |
|
Undisclosed amount |
| Sep 30, 2008 |
|
Undisclosed amount |
| Feb 18, 2004 |
|
$ 1,600,000 |
