| Date | Acquired | Amount |
|---|---|---|
| Feb 15, 2012 |
|
$ 79,700,000 |
| Oct 04, 2007 |
|
Undisclosed amount |
| Mar 24, 2006 |
|
Undisclosed amount |
| Dec 01, 2002 |
|
Undisclosed amount |
| May 01, 2001 |
|
Undisclosed amount |
