| Date | Acquired | Amount |
|---|---|---|
| Jan 01, 2012 |
|
Undisclosed amount |
| Jun 16, 2011 |
|
Undisclosed amount |
| Dec 08, 2009 |
|
$ 8,500,000 |
| Dec 08, 2009 |
|
Undisclosed amount |
| May 05, 2008 |
|
Undisclosed amount |
| Aug 31, 2004 |
|
$ 17,000,000 |
