Annual report pursuant to Section 13 and 15(d)

Recent Transactions (Narrative) (Details)

v3.6.0.2
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