Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Millions				3 Months Ended
	May 31, 2017	May 10, 2017	Feb. 28, 2017	Mar. 31, 2017	Apr. 17, 2017
Credit Agreement
Subsequent Event [Line Items]
Maximum borrowing capacity				$ 215.1
lender loan
Subsequent Event [Line Items]
Maximum borrowing capacity				$ 200.0
Common Units
Subsequent Event [Line Items]
Aggregate distribution of units				208,594
Class B Preferred
Subsequent Event [Line Items]
Aggregate distribution of units			208,594
Subsequent Event | Credit Agreement
Subsequent Event [Line Items]
Maximum borrowing capacity					$ 215.6
Subsequent Event | lender loan
Subsequent Event [Line Items]
Maximum borrowing capacity					200.0
Subsequent Event | Oil and natural gas reserves | Oklahoma
Subsequent Event [Line Items]
Proceeds from divestiture of business		$ 5.5
Subsequent Event | Common Units
Subsequent Event [Line Items]
Distribution declared per unit		$ 0.4375
Annual distribution declared per unit		1.75
Subsequent Event | Class B Preferred
Subsequent Event [Line Items]
Distribution declared per unit		$ 0.2258
Aggregate distribution of units	184,697
Upstream | Subsequent Event
Subsequent Event [Line Items]
Maximum borrowing capacity					168.1
Midstream | Subsequent Event
Subsequent Event [Line Items]
Maximum borrowing capacity					$ 47.5