| Date | Acquired | Amount |
|---|---|---|
| Jun 11, 2015 |
|
$ 3,750,000 |
| Jul 29, 2013 |
|
Undisclosed amount |
| May 09, 2011 |
|
$ 367,000,000 |
| May 23, 2008 |
|
Undisclosed amount |
| Feb 04, 2008 |
|
Undisclosed amount |
| Dec 13, 2007 |
|
Undisclosed amount |
| Nov 06, 2006 |
|
$ 357,000,000 |
| Mar 22, 2006 |
|
Undisclosed amount |
| Dec 14, 2005 |
|
Undisclosed amount |
| Apr 23, 2004 |
|
Undisclosed amount |
| Aug 04, 2003 |
|
$ 70,000,000 |
| Jul 23, 2002 |
|
Undisclosed amount |
| Dec 01, 2000 |
|
Undisclosed amount |
