Share Based Compensation (Tables)

6 Months Ended

Jun. 30, 2018

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Valuation and Expense Information

Valuation and Expense Information

	For the Quarter Ended				For the Six Months Ended
	Ended June 30,				Ended June 30,
	2018		2017		2018		2017
Total cost of share-based payment plans	$	2,263	$	34,679	$	13,173	$	35,890
Amounts capitalized in oil and gas properties and equipment	$	952	$	9,266	$	3,051	$	9,626
Amounts charged against income, before income tax benefit	$	1,311	$	25,413	$	10,122	$	26,264
Amount of related income tax benefit recognized in income before valuation allowance	$	275	$	10,114	$	2,126	$	10,453