|
Credit Facility (Details) (USD $)
|
3 Months Ended |
|
|
Mar. 31, 2015
|
Mar. 31, 2014
|
Dec. 31, 2014
|
| Credit facility |
|
|
|
| Outstanding balance |
$ 370,000,000 |
|
$ 223,000,000 |
| Credit Facility |
|
|
|
| Credit facility |
|
|
|
| Maximum borrowing capacity |
1,500,000,000 |
|
|
| Term of extension option |
1 year |
|
|
| Variable reference rate |
LIBOR |
|
|
| Variable interest rate, basis points spread over variable reference rate (as a percent) |
1.075% |
|
|
| Line of credit facility, commitment fee basis points (as a percent) |
0.175% |
|
|
| Line of credit facility, all-in drawn variable interest rate (as a percent) |
1.25% |
|
|
| Unamortized debt issuance costs |
3,400,000 |
|
|
| Current borrowing capacity available |
$ 1,130,000,000 |
|
|
| Average borrowing rate during the period (as a percent) |
1.20% |
1.20% |
|
| Effective interest rate (as a percent) |
1.20% |
|
|