| Date | Acquired | Amount |
|---|---|---|
| Feb 16, 2017 |
|
Undisclosed amount |
| Jul 26, 2016 |
|
Undisclosed amount |
| Apr 26, 2016 |
|
Undisclosed amount |
| Feb 02, 2016 |
|
Undisclosed amount |
| Jul 06, 2015 |
|
Undisclosed amount |
| Jan 27, 2015 |
|
$ 325,000,000 |
| Jan 08, 2015 |
|
Undisclosed amount |
| Jun 26, 2012 |
|
$ 31,500,000 |
| Jun 12, 2012 |
|
Undisclosed amount |
| Apr 11, 2011 |
|
Undisclosed amount |
| Nov 04, 2010 |
|
Undisclosed amount |
| Aug 01, 2006 |
|
Undisclosed amount |
