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Fair-Value Measurements (Tables)
 12 Months Ended
Dec. 31, 2019
Fair Value Disclosures [Abstract]  
Schedule of Placement Of Assets And Liabilities Within The Fair Value Hierarchy Levels
The following table sets forth by level within the fair value hierarchy our financial assets and liabilities that were accounted for at fair value on a recurring basis as of December 31, 2019 and 2018.
 

 
December 31, 2019
 
December 31, 2018
Recurring Fair Value Measures
Level 1
 
Level 2
 
Level 3
 
Level 1
 
Level 2
 
Level 3
Commodity derivatives:
 
 
 
 
 
 
 
 
 
 
 
Assets
$
211

 
$
1,382

 
$
—

 
$
3,900

 
$
1,274

 
$
—

Liabilities
$
(2,129
)
 
$
—

 
$
—

 
$
(1,405
)
 
$
(125
)
 
$
—

Preferred Distribution Rate Reset Election
$
—

 
$
—

 
$
(51,515
)
 
$
—

 
$
—

 
$
(40,840
)
Schedule of Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
The following table provides a reconciliation of changes in fair value at the beginning and ending balances for our derivatives classified as level 3:

Balance as of December 31, 2017
 
$
(45,209
)
Net gain for the period including earnings
 
8,360

Allocation of Distribution Paid-in-kind
 
(3,991
)
Balance as of December 31, 2018
 
(40,840
)
Net loss for the period included in earnings
 
(9,026
)
Allocation of Distribution Paid-in-kind
 
(1,649
)
Balance as of December 31, 2019
 
$
(51,515
)