Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2019

Fair Value Disclosures [Abstract]

Schedule of Fair Value Hierarchy, Measured on Recurring Basis

Recurring Fair Value Measurements

	As of September 30, 2019
	Level 1		Level 2		Level 3		Cash Collateral and Counterparty Netting			Total
	(in thousands)
Assets:
Commodity derivatives — Utilities	$	—	$	2,750	$	—	$	(2,335	)	$	415
Total	$	—	$	2,750	$	—	$	(2,335	)	$	415
Liabilities:
Commodity derivatives — Utilities	$	—	$	6,080	$	—	$	(3,471	)	$	2,609
Total	$	—	$	6,080	$	—	$	(3,471	)	$	2,609

	As of December 31, 2018
	Level 1		Level 2		Level 3		Cash Collateral and Counterparty Netting			Total
	(in thousands)
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 Balance Sheet Location

The following table presents the fair value and balance sheet classification of our derivative instruments (in thousands) as of:

	Balance Sheet Location	September 30, 2019			December 31, 2018
Derivatives designated as hedges:
Asset derivative instruments:
Current commodity derivatives	Derivative assets — current	$	—		$	415
Noncurrent commodity derivatives	Other assets, non-current	2			18
Liability derivative instruments:
Current commodity derivatives	Derivative liabilities — current	(427		)	(114		)
Noncurrent commodity derivatives	Other deferred credits and other liabilities	(70		)	(4		)
Total derivatives designated as hedges		$	(495	)	$	315
Derivatives not designated as hedges:
Asset derivative instruments:
Current commodity derivatives	Derivative assets — current	$	412		$	1,085
Noncurrent commodity derivatives	Other assets, non-current	1			1
Liability derivative instruments:
Current commodity derivatives	Derivative liabilities — current	(1,969		)	(833		)
Noncurrent commodity derivatives	Other deferred credits and other liabilities	(143		)	(56		)
Total derivatives not designated as hedges		$	(1,699	)	$	197