|3 Months Ended|
Mar. 31, 2018
|Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]|
7. Share-Based Compensation
The Company has share-based compensation plans, which are more fully described in Note 9, Share-Based Compensation, to the Consolidated Financial Statements included in the 2017 10-K. During the three months ended March 31, 2018, the Company granted restricted stock units subject to service conditions and service and performance conditions.
For the three months ended March 31, 2018 and 2017, share-based compensation expense amounted to $9.8 million and $11.3 million, respectively. As of March 31, 2018, the total unrecognized compensation cost related to all non-vested stock awards was $80.9 million and the related weighted-average period over which it is expected to be recognized is approximately 1.4 years.
The following tables summarize the activity under all share-based compensation plans for the three months ended March 31, 2018:
There were no SARs granted during the three months ended March 31, 2018. The weighted-average grant date fair value of SARs granted during the three months ended March 31, 2017 was $28.32. The total intrinsic value of SARs exercised during the three months ended March 31, 2018 and 2017 was $122.2 million and $16.8 million, respectively.
The following table summarizes the activities for stock units for the three months ended March 31, 2018:
The total vesting date fair value of stock units which vested during both the three months ended March 31, 2018 and 2017 was less than $0.1 million.
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://www.xbrl.org/2003/role/presentationRef