| Date | Acquired | Amount |
|---|---|---|
| Dec 03, 2013 |
|
Undisclosed amount |
| Sep 16, 2013 |
|
$ 192,000,000 |
| Jul 01, 2013 |
|
Undisclosed amount |
| Apr 22, 2013 |
|
Undisclosed amount |
| Oct 16, 2012 |
|
Undisclosed amount |
| Jul 05, 2012 |
|
Undisclosed amount |
| May 16, 2012 |
|
Undisclosed amount |
| Nov 21, 2011 |
|
$ 294,000,000 |
| Sep 15, 2011 |
|
$ 400,000,000 |
| May 26, 2011 |
|
Undisclosed amount |
| Apr 26, 2011 |
|
$ 230,000,000 |
| Jan 18, 2011 |
|
$ 127,000,000 |
| Apr 09, 2009 |
|
Undisclosed amount |
| Jun 19, 2006 |
|
Undisclosed amount |
| May 31, 2006 |
|
Undisclosed amount |
| Sep 18, 2003 |
|
Undisclosed amount |
