|
Units Outstanding (Details)
|
3 Months Ended |
|---|---|
|
Mar. 31, 2015
|
|
| Units Outstanding [Abstract] | |
| Units Outstanding, beginning of period (in units) | 100,756,999 |
| Options exercised (in units) | 228,816 |
| Units issued (in units) | 27,755 |
| Units retired (in units) | (689,030) |
| Units Outstanding, end of period (in units) | 100,324,540 |