Recent Transactions (Narrative) (Details) - Investment Agreement [Member] - Subsequent Event [Member] $ / item in Millions, $ in Millions |
Feb. 27, 2017
USD ($)
$ / item
|
|---|---|
| Preferred Units [Line Items] | |
| Preferred units initial closing costs | $ 150 |
| Preferred units, incremental closing payment | $ / item | 10 |
| Maximum [Member] | |
| Preferred Units [Line Items] | |
| Preferred units aggregate amount | $ 300 |
| Rockpoint [Member] | |
| Preferred Units [Line Items] | |
| Preferred units deposit | $ 30 |