Share Based Compensation (Tables)

9 Months Ended

Sep. 30, 2017

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Valuation and Expense Information

Valuation and Expense Information

	Three Months				Nine Months
	Ended September 30,				Ended September 30,
	2017		2016		2017		2016
Total cost of share-based payment plans	$	10,276	$	1,706	$	46,166	$	5,756
Amounts capitalized in oil and gas properties and equipment	$	2,358	$	442	$	11,984	$	1,789
Amounts charged against income, before income tax benefit	$	7,918	$	1,264	$	34,182	$	3,967
Amount of related income tax benefit recognized in income before valuation allowance	$	3,151	$	503	$	13,604	$	1,579