|
Dividend Reinvestment and Stock Purchase Plan (Details) (USD $)
In Millions, except Share data, unless otherwise specified |
3 Months Ended | 49 Months Ended | |
|---|---|---|---|
|
Mar. 31, 2015
|
Mar. 31, 2014
|
Mar. 31, 2015
|
|
| Dividend Reinvestment and Stock Purchase Plan | |||
| Authorized common shares to be issued | 11,000,000 | ||
| Number of common shares issued | 2,023,276 | 55,870 | 7,114,784 |
| Amount raised from shares issued | $ 102.2 | $ 2.3 | $ 320.8 |
| Number of common shares issued under the waiver approval process | 1,980,994 | ||
| Amount raised from share issued under the waiver approval process | $ 100.0 | ||