Share Based Compensation (Tables)

9 Months Ended

Sep. 30, 2018

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Valuation and Expense Information

Valuation and Expense Information

	For the Three Months				For the Nine Months Ended
	Ended September 30,				Ended September 30,
	2018		2017		2018		2017
Total cost of share-based payment plans	$	2,148	$	10,276	$	15,321	$	46,166
Amounts capitalized in oil and gas properties and equipment	$	724	$	2,358	$	3,774	$	11,984
Amounts charged against income, before income tax benefit	$	1,424	$	7,918	$	11,547	$	34,182
Amount of related income tax benefit recognized in income before valuation allowance	$	299	$	3,151	$	2,425	$	13,604