| Date | Acquired | Amount |
|---|---|---|
| Aug 02, 2017 |
|
$ 250,000,000 |
| Jun 19, 2017 |
|
Undisclosed amount |
| Feb 27, 2017 |
|
$ 300,000,000 |
| Jan 24, 2017 |
|
$ 75,000,000 |
| Jun 16, 2016 |
|
$ 7,100,000 |
| May 17, 2016 |
|
Undisclosed amount |
| Feb 24, 2016 |
|
$ 68,000,000 |
| Jun 02, 2015 |
|
$ 49,000,000 |
| Jun 17, 2014 |
|
Undisclosed amount |
| Feb 10, 2014 |
|
Undisclosed amount |
| Oct 29, 2013 |
|
Undisclosed amount |
| Jul 23, 2012 |
|
Undisclosed amount |
| Aug 22, 2011 |
|
Undisclosed amount |
| Jul 29, 2011 |
|
Undisclosed amount |
| Jun 23, 2010 |
|
Undisclosed amount |
| Feb 16, 2010 |
|
Undisclosed amount |
| Nov 12, 2009 |
|
Undisclosed amount |
| Oct 15, 2008 |
|
Undisclosed amount |
