|12 Months Ended|
Dec. 31, 2018
|Share-based Compensation [Abstract]|
During the years ended December 31, 2018, 2017 and 2016 the Company’s stock-based compensation cost was $11.3 million, $10.6 million and $12.3 million, respectively, of which the Company capitalized $4.5 million, $4.2 million and $4.9 million, respectively, relating to its exploration and development efforts.
The following table summarizes restricted stock activity for the twelve months ended December 31, 2018, 2017 and 2016:
Unrecognized compensation expense as of December 31, 2018 related to outstanding stock options and restricted shares was $13.9 million. The expense is expected to be recognized over a weighted average period of 1.60 years.
The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.
Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef