Derivative Instruments and Hedging Activities (Tables)

12 Months Ended

Dec. 31, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Outstanding commodity derivatives

As of December 31, 2018, the Company had the following outstanding financial commodity derivatives:

			Swaps		Basis Swaps
Type of Contract	Volume (Mmbtu)	Contract Period	Weighted- Average ($/Mmbtu)		Weighted- Average ($/Mmbtu)
Natural gas (IFERC TRANSCO Z6 non-NY)	10,950,000	Jan. 2019 - Dec. 2019			$	0.41
Natural gas (IFERC TRANSCO Z6 non-NY)	11,700,000	Jan. 2019 - Mar. 2019	$	7.38
Natural gas (IFERC TRANSCO Leidy Line Receipts)	54,750,000	Jan. 2019 - Dec. 2019			$	(0.53	)
Natural gas (NYMEX)	4,500,000	Jan. 2019 - Mar. 2019	$	4.31
Natural gas (NYMEX)	10,700,000	Apr. 2019 - Oct. 2019	$	2.75
Natural gas (NYMEX)	109,500,000	Jan. 2019 - Dec. 2019	$	3.13

In early 2019, we entered into the following financial commodity derivative contracts:

			Swaps
Type of Contract	Volume (Mmbtu)	Contract Period	Weighted- Average ($/Mmbtu)
Natural gas (NYMEX)	42,800,000	Apr. 2019 - Oct. 2019	$	2.86

Effect of Derivative Instruments on the Consolidated Balance Sheet

Effect of Derivative Instruments on the Consolidated Balance Sheet

		Fair Values of Derivative Instruments
		Derivative Assets				Derivative Liabilities
		December 31,				December 31,
(In thousands)	Balance Sheet Location	2018		2017		2018		2017
Commodity contracts	Derivative instruments (current)	$	57,665	$	—	$	—	$	30,637
Commodity contracts	Derivative instruments (non-current)	—		2,239		—		—
		$	57,665	$	2,239	$	—	$	30,637

Schedule of offsetting of derivative liabilities in the condensed consolidated balance sheet

Offsetting of Derivative Assets and Liabilities in the Consolidated Balance Sheet

	December 31,
(In thousands)	2018			2017
Derivative assets
Gross amounts of recognized assets	$	60,105		$	2,239
Gross amounts offset in the statement of financial position	(2,440		)	—
Net amounts of assets presented in the statement of financial position	57,665			2,239
Gross amounts of financial instruments not offset in the statement of financial position	—			—
Net amount	$	57,665		$	2,239
Derivative liabilities
Gross amounts of recognized liabilities	$	2,440		$	30,637
Gross amounts offset in the statement of financial position	(2,440		)	—
Net amounts of liabilities presented in the statement of financial position	—			30,637
Gross amounts of financial instruments not offset in the statement of financial position	—			241
Net amount	$	—		$	30,878

Schedule of offsetting of derivative assets in the condensed consolidated balance sheet

Offsetting of Derivative Assets and Liabilities in the Consolidated Balance Sheet

	December 31,
(In thousands)	2018			2017
Derivative assets
Gross amounts of recognized assets	$	60,105		$	2,239
Gross amounts offset in the statement of financial position	(2,440		)	—
Net amounts of assets presented in the statement of financial position	57,665			2,239
Gross amounts of financial instruments not offset in the statement of financial position	—			—
Net amount	$	57,665		$	2,239
Derivative liabilities
Gross amounts of recognized liabilities	$	2,440		$	30,637
Gross amounts offset in the statement of financial position	(2,440		)	—
Net amounts of liabilities presented in the statement of financial position	—			30,637
Gross amounts of financial instruments not offset in the statement of financial position	—			241
Net amount	$	—		$	30,878

Effect of Derivative Instruments on the Consolidated Statement of Operations

Effect of Derivative Instruments on the Consolidated Statement of Operations

	Year Ended December 31,
(In thousands)	2018			2017		2016
Cash received (paid) on settlement of derivative instruments
Gain (loss) on derivative instruments	$	(41,631	)	$	8,056	$	(1,682	)
Non-cash gain (loss) on derivative instruments
Gain (loss) on derivative instruments	86,063			8,870		(37,268		)
	$	44,432		$	16,926	$	(38,950	)