| Date | Acquired | Amount |
|---|---|---|
| Jul 01, 2012 |
|
Undisclosed amount |
| Feb 06, 2012 |
|
Undisclosed amount |
| Nov 08, 2010 |
|
Undisclosed amount |
| Jul 29, 2010 |
|
Undisclosed amount |
| Nov 30, 2009 |
|
$ 18,000,000 |
| Aug 10, 2009 |
|
$ 18,000,000 |
| Apr 01, 2008 |
|
$ 27,500,000 |
| Feb 01, 2008 |
|
$ 26,600,000 |
