| Date | Acquired | Amount |
|---|---|---|
| Jan 04, 2017 |
|
Undisclosed amount |
| Dec 06, 2016 |
|
Undisclosed amount |
| Jan 05, 2016 |
|
Undisclosed amount |
| Jul 06, 2011 |
|
$ 256,000,000 |
| Oct 07, 2009 |
|
$ 295,000,000 |
| Dec 03, 1997 |
|
$ 115,000,000 |
