| Date | Acquired | Amount |
|---|---|---|
| Dec 17, 2015 |
|
Undisclosed amount |
| Mar 04, 2011 |
|
Undisclosed amount |
| Mar 04, 2011 |
|
Undisclosed amount |
| May 13, 2010 |
|
Undisclosed amount |
| Oct 08, 2007 |
|
$ 71,500,000 |
| Oct 01, 2007 |
|
Undisclosed amount |
| May 13, 2007 |
|
$ 5,000,000 |
| May 01, 2007 |
|
$ 280,000,000 |
| Nov 03, 2005 |
|
$ 325,000,000 |
| Jan 19, 2000 |
|
Undisclosed amount |
| Sep 19, 1997 |
|
Undisclosed amount |
