Stock-Based Compensation

3 Months Ended

Mar. 31, 2017

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

7. STOCK-BASED COMPENSATION

We recognize the cost of employee compensation received in the form of equity instruments based on the grant date fair value of those awards. The table below sets forth the total amount of stock-based compensation expense for quarters ended March 31, 2017 and 2016.


	Quarter Ended
	March 31,
	2017		2016
	(Thousands of dollars)
Stock-based compensation expense:
Time-based restricted stock units	$	553	$	619
Performance-based restricted stock units		—		871

Total stock-based compensation expense	$	553	$	1,490

During the quarter ended March 31, 2017, we awarded 366,399 performance-based restricted stock units and 29,351 time-based restricted stock units, respectively, to managerial employees. During the quarter ended March 31, 2016, we awarded 303,061 performance-based restricted stock units to managerial employees.

- Definition

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.

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