| Date | Acquired | Amount |
|---|---|---|
| Feb 01, 2012 |
|
$ 2,400,000 |
| Apr 12, 2011 |
|
Undisclosed amount |
| Jul 03, 2009 |
|
$ 1,100,000 |
| Oct 01, 2008 |
|
$ 1,080,000 |
