|
Noncontrolling Interests of the Trust- Narrative (Details) (USD $)
In Millions, except Share data, unless otherwise specified |
Mar. 31, 2015
|
Dec. 31, 2014
|
|---|---|---|
| Redeemable Noncontrolling Interest [Line Items] | ||
| Common units, units outstanding not held by the trust | 3,539,075 | 3,553,566 |
| Market value of common units based on closing price | $ 126.3 |