| Date | Acquired | Amount |
|---|---|---|
| Nov 07, 2015 |
|
$ 280,000,000 |
| Jul 30, 2015 |
|
Undisclosed amount |
| Dec 09, 2013 |
|
Undisclosed amount |
| May 22, 2013 |
|
Undisclosed amount |
| Dec 17, 2012 |
|
Undisclosed amount |
| Apr 21, 2008 |
|
Undisclosed amount |
| Jan 03, 2006 |
|
$ 60,000,000 |
| Jul 19, 2004 |
|
$ 17,500,000 |
