| Date | Acquired | Amount |
|---|---|---|
| May 06, 2013 |
|
Undisclosed amount |
| Oct 04, 2011 |
|
Undisclosed amount |
| Mar 23, 2011 |
|
Undisclosed amount |
| Jul 30, 2010 |
|
Undisclosed amount |
| Jun 08, 2010 |
|
Undisclosed amount |
| Jul 30, 2009 |
|
$ 140,000,000 |
| May 15, 2009 |
|
$ 47,000,000 |
| Sep 21, 2008 |
|
$ 465,000,000 |
| Aug 31, 2008 |
|
$ 2,000,000 |
| Jul 31, 2008 |
|
$ 46,000,000 |
| Oct 11, 2007 |
|
Undisclosed amount |
| Oct 16, 2006 |
|
$ 20,000,000 |
| Jun 06, 2006 |
|
Undisclosed amount |
| Apr 05, 2006 |
|
Undisclosed amount |
| Jun 03, 2005 |
|
Undisclosed amount |
| Aug 16, 2004 |
|
$ 86,000,000 |
| Apr 03, 2003 |
|
$ 100,000,000 |
| Feb 01, 2000 |
|
Undisclosed amount |
