| Date | Acquired | Amount |
|---|---|---|
| Nov 29, 2011 |
|
Undisclosed amount |
| Sep 08, 2011 |
|
Undisclosed amount |
| Aug 01, 2011 |
|
Undisclosed amount |
| Jul 22, 2011 |
|
Undisclosed amount |
| Apr 05, 2011 |
|
Undisclosed amount |
| Mar 21, 2011 |
|
Undisclosed amount |
| Dec 17, 2010 |
|
Undisclosed amount |
| Oct 15, 2010 |
|
Undisclosed amount |
| Jun 01, 2009 |
|
$ 51,000,000 |
| Apr 28, 2008 |
|
Undisclosed amount |
| Jul 05, 2005 |
|
$ 32,000,000 |
| Aug 26, 2004 |
|
$ 73,000,000 |
| Jan 17, 2003 |
|
Undisclosed amount |
