Impairments (Tables)

12 Months Ended

Dec. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Details of Impairment of Long-Lived Assets Held and Used by Asset

The following table summarizes impairment charges recorded during the periods presented:

	Year Ended December 31,
	2015		2014		2013
Oil and gas properties	$	1,396,340	$	791,809	$	132,224
Other – tubular inventory and well materials	1,084		—		—
	$	1,397,424	$	791,809	$	132,224

Fair Value Measurements, Nonrecurring

The following table summarizes the aggregate fair values of the assets described below, by asset category and the classification of inputs within the fair value measurement hierarchy, at the respective dates of impairment:

	Fair Value
	Measurement		Level 1		Level 2		Level 3
Year ended December 31, 2015:
Long-lived assets held for use	$	311,886	$	—	$	—	$	311,886
Year ended December 31, 2014:
Long-lived assets held for use	$	65,203	$	—	$	—	$	65,203
Long-lived assets sold during the year	70,733		$	—	$	—	$	70,733
Year ended December 31, 2013:
Long-lived assets held for use	$	93,945	$	—	$	—	$	93,945