| Date | Acquired | Amount |
|---|---|---|
| Jul 18, 2007 |
|
$ 23,000,000 |
| Aug 01, 2006 |
|
Undisclosed amount |
| Jul 01, 2005 |
|
$ 63,200,000 |
| Nov 15, 2004 |
|
$ 7,300,000 |
