| Date | Acquired | Amount |
|---|---|---|
| Jan 22, 2016 |
|
$ 212,000,000 |
| Dec 04, 2015 |
|
$ 155,000,000 |
| Oct 08, 2015 |
|
Undisclosed amount |
| May 27, 2015 |
|
Undisclosed amount |
| Apr 04, 2015 |
|
Undisclosed amount |
| Mar 18, 2015 |
|
$ 200,000,000 |
| Sep 12, 2012 |
|
Undisclosed amount |
| Jul 02, 2012 |
|
$ 380,000,000 |
| Feb 16, 2012 |
|
Undisclosed amount |
| Sep 28, 2011 |
|
Undisclosed amount |
| Mar 02, 2010 |
|
Undisclosed amount |
| Feb 10, 2010 |
|
Undisclosed amount |
| Jan 28, 2010 |
|
Undisclosed amount |
| Apr 22, 2008 |
|
$ 260,000,000 |
| May 16, 2007 |
|
Undisclosed amount |
| Jul 21, 2005 |
|
Undisclosed amount |
| Sep 14, 2004 |
|
Undisclosed amount |
| Dec 01, 2002 |
|
Undisclosed amount |
| Oct 04, 1991 |
|
Undisclosed amount |
| Sep 29, 1989 |
|
Undisclosed amount |
| Feb 04, 1982 |
|
Undisclosed amount |
