Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Restricted Stock Awards and Stock Options

For restricted stock awards and stock options, we had:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2018		2017		2018		2017
	(In millions)
Recognized stock compensation expense	$	4.0	$	3.2	$	9.5	$	5.8
Capitalized stock compensation cost for our oil and natural gas properties	0.6		0.4		1.0		0.8
Tax benefit on stock-based compensation	1.0		1.2		2.3		2.2

Schedule of Fair Value of the Restricted Stock Awards Granted During the Periods

This table shows the fair value of restricted stock awards granted to employees and non-employee directors during the periods indicated:

	Three Months Ended					Three Months Ended
	June 30, 2018					June 30, 2017
	Time Vested			Performance Vested		Time Vested			Performance Vested
Shares granted:
Employees	5,000			—		14,000			21,000
Non-employee directors	44,312			—		49,104			—
	49,312			—		63,104			21,000
Estimated fair value (in millions):(1)
Employees	$	0.1		$	—	$	0.4		$	0.5
Non-employee directors	0.9			—		0.9			—
	$	1.0		$	—	$	1.3		$	0.5
Percentage of shares granted expected to be distributed:
Employees	95		%	N/A		100		%	87		%
Non-employee directors	100		%	N/A		100		%	N/A

_______________________

(1) The performance shares represent 100% of the grant date fair value. (We recognize the grant date fair value minus estimated forfeitures.)

	Six Months Ended						Six Months Ended
	June 30, 2018						June 30, 2017
	Time Vested			Performance Vested			Time Vested			Performance Vested
Shares granted:
Employees	844,498			362,070			475,799			173,373
Non-employee directors	44,312			—			49,104			—
	888,810			362,070			524,903			173,373
Estimated fair value (in millions):(1)
Employees	$	16.2		$	7.3		$	11.8		$	4.5
Non-employee directors	0.9			—			0.9			—
	$	17.1		$	7.3		$	12.7		$	4.5
Percentage of shares granted expected to be distributed:
Employees	95		%	62		%	95		%	87		%
Non-employee directors	100		%	N/A			100		%	N/A

_______________________

(1) The performance shares represent 100% of the grant date fair value. (We recognize the grant date fair value minus estimated forfeitures.)