Stock-Based Compensation

6 Months Ended

Jun. 30, 2019

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

9. 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 the quarter and six months ended June 30, 2019 and 2018.

	Quarter Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
	(Thousands of dollars)
Stock-based compensation expense:
Time-based restricted stock units	$	845	$	435	$	1,685	$	1,077
Performance-based restricted stock units		480		378		955		1,055
Total stock-based compensation expense	$	1,325	$	813	$	2,640	$	2,132

During the quarter and six months ended June 30, 2019, no time-based restricted units or performance units were awarded to managerial employees.

During the quarter and six months ended June 30, 2018, 321,831 time-based restricted units and 448,012 performance-based restricted units were awarded to managerial employees.

On February 20, 2019, the PHI Compensation Committee approved the vesting of the 2017 performance RSUs based on the Company’s financial results exceeding the pre-determined business performance metrics set in 2017 for the two year performance period (January 1, 2017 - December 31, 2018). The PHI Compensation Committee decided to settle these vested RSU awards in cash based upon the closing market price on February 20, 2019, the date of the committee's certification that the performance metrics were met ($2.21 per share). The total amount of cash paid was $0.8 million. On February 20, 2019, the Compensation Committee certified that the performance metrics for performance-based restricted stock units granted in 2016 had not been met, which resulted in the forfeiture of 667,238 of such RSUs.