| Date | Acquired | Amount |
|---|---|---|
| Dec 07, 2009 |
|
$ 30,000,000 |
| Sep 29, 2008 |
|
Undisclosed amount |
| May 02, 2008 |
|
$ 45,000,000 |
| Mar 18, 2008 |
|
$ 24,500,000 |
| Mar 25, 2004 |
|
$ 228,000,000 |
| Jul 11, 2002 |
|
Undisclosed amount |
| Jan 02, 2002 |
|
Undisclosed amount |
| Jan 02, 2002 |
|
$ 920,000,000 |
| Mar 20, 2000 |
|
Undisclosed amount |
| Jan 18, 2000 |
|
Undisclosed amount |
