Derivative Instruments (Tables)

12 Months Ended

Dec. 31, 2018

Summary of Outstanding Contracts with Respect to Natural Gas



				Floors				Ceilings
Period and Type of Contract	MMBtus	Swaps Weighted Average Price		Range		Weighted average price		Range	Weighted average price
January 2019 - March 2019
Swaps - Henry Hub	4,950,000	$	4.70
April 2019 - December 2019
Swaps - Henry Hub	95,425,000	$	2.78
January 2019 - March 2019
Collars - Henry Hub	4,950,000			$	4.25	$	4.25	$5.50 - $5.58	$	5.52

Realized and Unrealized Gains and Losses on Derivative Instruments

Cash receipts in the following table reflect gains on diesel fuel derivatives which matured during the respective period, calculated as the difference between the contract price and the market settlement price of matured contracts. Non-cash gains and losses below represent the change in fair value of diesel fuel derivatives held at period end, if any, and the reversal of previously recognized non-cash gains or losses on derivative contracts that matured during the respective period.



	Year ended December 31,
In thousands	2017			2016
Cash received on diesel fuel derivatives	$	2,845		$	699
Non-cash gain (loss) on diesel fuel derivatives	(4,060		)	4,060
Gain (loss) on diesel fuel derivatives, net	$	(1,215	)	$	4,759



	Year ended December 31,
In thousands	2018			2017			2016
Cash received (paid) on derivatives:
Natural gas fixed price swaps	$	(36,939	)	$	40,095		$	88,823
Natural gas collars	—			(10,539		)	—
Cash received (paid) on derivatives, net	(36,939		)	29,556			88,823
Non-cash gain (loss) on derivatives:
Crude oil written call options	—			—			38
Natural gas fixed price swaps	7,527			18,960			(120,784		)
Natural gas collars	5,482			43,131			(39,936		)
Non-cash gain (loss) on derivatives, net	13,009			62,091			(160,682		)
Gain (loss) on crude oil and natural gas derivatives, net	$	(23,930	)	$	91,647		$	(71,859	)

Balance sheet offsetting of derivative assets and liabilities

The following table presents the gross amounts of recognized natural gas derivative assets and liabilities, as applicable, the amounts offset under netting arrangements with counterparties, and the resulting net amounts presented in the consolidated balance sheets for the periods presented, all at fair value.



	December 31,
In thousands	2018			2017
Commodity derivative assets:
Gross amounts of recognized assets	$	16,789		$	2,603
Gross amounts offset on balance sheet	(1,177		)	—
Net amounts of assets on balance sheet	15,612			2,603
Commodity derivative liabilities:
Gross amounts of recognized liabilities	(1,177		)	—
Gross amounts offset on balance sheet	1,177			—
Net amounts of liabilities on balance sheet	$	—		$	—

Schedule Of Derivative Assets Liabilities At Fair Value Net By Balance Sheet Classification Table

The following table reconciles the net amounts disclosed above to the individual financial statement line items in the consolidated balance sheets.



	December 31,
In thousands	2018		2017
Derivative assets	$	15,612	$	2,603
Noncurrent derivative assets	—		—
Net amounts of assets on balance sheet	15,612		2,603
Derivative liabilities	—		—
Noncurrent derivative liabilities	—		—
Net amounts of liabilities on balance sheet	—		—
Total derivative assets, net	$	15,612	$	2,603