Derivative Instruments and Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivatives reflected in the consolidated balance sheet

The estimated fair value of forward month commodity contracts (derivatives) reflected in the accompanying unaudited condensed consolidated balance sheet were as follows at the date indicated (in thousands):

	June 30, 2018
	Balance Sheet Location and Amount
	Current		Other		Current		Other
	Assets		Assets		Liabilities		Liabilities
Asset derivatives:
Fair value forward hydrocarbon commodity
contracts at gross valuation	$	538	$	—	$	—	$	—
Liability derivatives:
Fair value forward hydrocarbon commodity
contracts at gross valuation	—		—		514		—
Less counterparty offsets	—		—		—		—
As reported fair value contracts	$	538	$	—	$	514	$	—

At December 31, 2017, we had in place 20 commodity purchase and sale contracts, of which four of these contracts had no fair value associated with them as the contractual prices of crude oil were within the range of prices specified in the agreements. These commodity purchase and sale contracts encompassed approximately:

• 452 barrels per day of crude oil during January 2018;

• 322 barrels per day of crude oil during February through May 2018;

• 258 barrels per day of crude oil during June 2018;

• 646 barrels per day of crude oil during July 2018;

• 322 barrels per day of crude oil during August through September 2018; and

• 258 barrels per day of crude oil during October through December 2018.

The estimated fair value of forward month commodity contracts (derivatives) reflected in the accompanying unaudited condensed consolidated balance sheet were as follows at the date indicated (in thousands):

	December 31, 2017
	Balance Sheet Location and Amount
	Current		Other		Current		Other
	Assets		Assets		Liabilities		Liabilities
Asset derivatives:
Fair value forward hydrocarbon commodity
contracts at gross valuation	$	166	$	—	$	—	$	—
Liability derivatives:
Fair value forward hydrocarbon commodity
contracts at gross valuation	—		—		145		—
Less counterparty offsets	—		—		—		—
As reported fair value contracts	$	166	$	—	$	145	$	—

Derivatives reflected in the consolidated statement of operations

Forward month commodity contracts (derivatives) reflected in the accompanying unaudited condensed consolidated statements of operations were as follows for the periods indicated (in thousands):

	Gains (losses)
	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2018		2017		2018		2017
Revenues – marketing	$	1	$	280	$	2	$	700

Fair value assets and liabilities

The following tables set forth, by level with the Level 1, 2 and 3 fair value hierarchy, the carrying values of our financial assets and liabilities at the dates indicated (in thousands):

	June 30, 2018
	Fair Value Measurements Using
	Quoted Prices
	in Active		Significant
	Markets for		Other		Significant
	Identical Assets		Observable		Unobservable
	and Liabilities		Inputs		Inputs		Counterparty
	(Level 1)		(Level 2)		(Level 3)		Offsets		Total
Derivatives:
Current assets	$	—	$	538	$	—	$	—	$	538
Current liabilities	—		(514)		—		—		(514)
Net value	$	—	$	24	$	—	$	—	$	24

	December 31, 2017
	Fair Value Measurements Using
	Quoted Prices
	in Active		Significant
	Markets for		Other		Significant
	Identical Assets		Observable		Unobservable
	and Liabilities		Inputs		Inputs		Counterparty
	(Level 1)		(Level 2)		(Level 3)		Offsets		Total
Derivatives:
Current assets	$	—	$	166	$	—	$	—	$	166
Current liabilities	—		(145)		—		—		(145)
Net value	$	—	$	21	$	—	$	—	$	21