| Date | Acquired | Amount |
|---|---|---|
| Jul 07, 2016 |
|
Undisclosed amount |
| Oct 29, 2015 |
|
$ 385,000,000 |
| Apr 16, 2015 |
|
Undisclosed amount |
| Mar 09, 2015 |
|
$ 252,000,000 |
| Jan 07, 2013 |
|
Undisclosed amount |
| Jul 01, 2010 |
|
Undisclosed amount |
