Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2019

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

The following tables set forth, by level within the fair value hierarchy, our gross assets and gross liabilities and related offsetting as permitted by GAAP that were accounted for at fair value on a recurring basis for derivative instruments (in thousands):

	As of December 31, 2019
	Level 1		Level 2		Level 3		Cash Collateral and Counterparty Netting			Total
Assets:
Commodity derivatives - Utilities	$	—	$	1,433	$	—	$	(1,085	)	$	348
Total	$	—	$	1,433	$	—	$	(1,085	)	$	348
Liabilities:
Commodity derivatives - Utilities	$	—	$	5,254	$	—	$	(2,909	)	$	2,345
Total	$	—	$	5,254	$	—	$	(2,909	)	$	2,345

	As of December 31, 2018
	Level 1		Level 2		Level 3		Cash Collateral and Counterparty Netting			Total
Assets:
Commodity derivatives - Utilities	$	—	2,927		$	—	$	(1,408	)	$	1,519
Total	$	—	$	2,927	$	—	$	(1,408	)	$	1,519
Liabilities:
Commodity derivatives - Utilities	$	—	$	6,801	$	—	$	(5,794	)	$	1,007
Total	$	—	$	6,801	$	—	$	(5,794	)	$	1,007

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value

The following tables present the fair value and balance sheet classification of our derivative instruments as of December 31, (in thousands):

		December 31,
	Balance Sheet Location	2019			2018
Derivatives designated as hedges:
Asset derivative instruments:
Current commodity derivatives	Derivative assets - current	$	1		$	415
Noncurrent commodity derivatives	Other assets, non-current	3			18
Liability derivative instruments:
Current commodity derivatives	Derivative liabilities - current	(490		)	(114		)
Noncurrent commodity derivatives	Other deferred credits and other liabilities	(29		)	(4		)
Total derivatives designated as hedges		$	(515	)	$	315
Not designated as hedges:
Asset derivative instruments:
Current commodity derivatives	Derivative assets - current	$	341		$	1,085
Noncurrent commodity derivatives	Other assets, non-current	2			1
Liability derivative instruments:
Current commodity derivatives	Derivative liabilities - current	(1,764		)	(833		)
Noncurrent commodity derivatives	Other deferred credits and other liabilities	(63		)	(56		)
Total derivatives not designated as hedges		$	(1,484	)	$	197

Schedule of Derivative Offsetting on Balance Sheet

Offsetting of derivative assets and derivative liabilities on our Consolidated Balance Sheets at December 31, 2019 was as follows (in thousands):

Derivative Assets	Gross Amounts of Derivative Assets		Gross Amounts Offset on Consolidated Balance Sheets			Net Amount of Total Derivative Assets on Consolidated Balance Sheets
Commodity derivative assets subject to a master netting agreement or similar arrangement	$	1,085	$	(1,085	)	$	—
Commodity derivative assets not subject to a master netting agreement or similar arrangement	348		—			348
Total derivative assets	$	1,433	$	(1,085	)	$	348

Derivative Liabilities	Gross Amounts of Derivative Liabilities		Gross Amounts Offset on Consolidated Balance Sheets			Net Amount of Total Derivative Liabilities on Consolidated Balance Sheets
Commodity derivative liabilities subject to a master netting agreement or similar arrangement	$	2,908	$	(2,908	)	$	—
Commodity derivative liabilities not subject to a master netting agreement or similar arrangement	2,345		—			2,345
Total derivative liabilities	$	5,253	$	(2,908	)	$	2,345

Offsetting of derivative assets and derivative liabilities on our Consolidated Balance Sheets as of December 31, 2018 were as follows (in thousands):

Derivative Assets	Gross Amounts of Derivative Assets		Gross Amounts Offset on Consolidated Balance Sheets			Net Amount of Total Derivative Assets on Consolidated Balance Sheets
Commodity derivative assets subject to a master netting agreement or similar arrangement	$	1,408	$	(1,408	)	$	—
Commodity derivative assets not subject to a master netting agreement or similar arrangement	1,519		—			1,519
Total derivative assets	$	2,927	$	(1,408	)	$	1,519

Derivative Liabilities	Gross Amounts of Derivative Liabilities		Gross Amounts Offset on Consolidated Balance Sheets			Net Amount of Total Derivative Liabilities on Consolidated Balance Sheets
Commodity derivative liabilities subject to a master netting agreement or similar arrangement	$	5,794	$	(5,794	)	$	—
Commodity derivative liabilities not subject to a master netting agreement or similar arrangement	1,007		—			1,007
Total derivative liabilities	$	6,801	$	(5,794	)	$	1,007