| Date | Acquired | Amount |
|---|---|---|
| Aug 28, 2014 |
|
Undisclosed amount |
| Aug 22, 2014 |
|
Undisclosed amount |
| Apr 11, 2014 |
|
Undisclosed amount |
| Dec 09, 2013 |
|
Undisclosed amount |
| Feb 19, 2013 |
|
$ 72,000,000 |
| May 09, 2012 |
|
$ 60,000,000 |
| Apr 30, 2012 |
|
$ 40,000,000 |
| Apr 06, 2012 |
|
$ 310,000,000 |
| Mar 19, 2012 |
|
$ 300,000,000 |
| Nov 21, 2011 |
|
$ 325,000,000 |
| Dec 14, 2009 |
|
Undisclosed amount |
| Mar 01, 2009 |
|
Undisclosed amount |
