| Date | Acquired | Amount |
|---|---|---|
| Dec 17, 2012 |
|
Undisclosed amount |
| Apr 12, 2010 |
|
Undisclosed amount |
| Mar 08, 2010 |
|
Undisclosed amount |
| Feb 01, 2010 |
|
Undisclosed amount |
| Nov 08, 2007 |
|
Undisclosed amount |
| Aug 13, 2007 |
|
Undisclosed amount |
| Apr 01, 2007 |
|
Undisclosed amount |
| Dec 07, 2004 |
|
$ 40,000,000 |
| Feb 14, 2000 |
|
Undisclosed amount |
