| Date | Acquired | Amount |
|---|---|---|
| Oct 10, 2012 |
|
Undisclosed amount |
| Mar 19, 2012 |
|
Undisclosed amount |
| Oct 24, 2011 |
|
Undisclosed amount |
| Sep 02, 2010 |
|
$ 10,100,000 |
| Jul 01, 2008 |
|
Undisclosed amount |
