Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2017

Fair Value Disclosures [Abstract]

Net Valuation of Derivatives

The following table summarizes the Company’s assets (liabilities) that are subject to fair value measurement on a recurring basis as of December 31, 2017 and December 31, 2016 (in thousands):

	Fair Value Measurements Using
Instrument	Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
Commodity Derivatives:
At December 31, 2017	$	—	$	443		$	—
At December 31, 2016	$	—	$	(4,750	)	$	—

Fair Value, Liabilities Measured on Recurring and Nonrecurring Basis

The following table summarizes the fair value of the 2017 Notes, 2021 Notes and 2021 PIK Notes as of December 31, 2017 and 2016, respectively (in thousands).

	Fair Value at 12/31/17		Face Value at 12/31/17		Carrying value at 12/31/17		Fair Value at 12/31/16		Face Value at 12/31/16		Carrying value at 12/31/16
2017 Notes	$	—	$	—	$	—	$	21,970	$	22,650	$	22,568
2021 Notes	7,306		9,427		9,821		12,192		14,177		15,228
2021 PIK Notes	198,717		263,202		271,577		177,732		243,468		248,600
	$	206,023	$	272,629	$	281,398	$	211,894	$	280,295	$	286,396