Employee Stock Plans (Tables)

6 Months Ended

Jun. 30, 2021

Share-based Payment Arrangement [Abstract]

Schedule of Stock-Based Compensation Awards

Compensation expense for stock-based awards recognized during the three and six months ended June 30, 2021 and 2020 was as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
Stock options	$	232	$	367	$	533	$	788
Restricted stock units and awards	1,445		1,324		2,826		2,495
Performance share units	922		566		2,095		997
Total stock-based compensation expense	$	2,599	$	2,257	$	5,454	$	4,280

Schedule of Stock Options, Restricted Stock Units and Awards, and Performance Share Units Award Activity

The following table presents our stock options and restricted stock units and awards activity during the six months ended June 30, 2021 (in thousands, except per share data):

	Stock Options			Restricted Stock Units and Awards
	Number of Options	Weighted Average Exercise Price Per Share		Number of Shares	Weighted Average Grant-Date Fair Value (1)
Outstanding at beginning of year	1,820	$	15.02	461	$	21.03
Granted	—	$	—	174	$	28.62
Exercised or released	(493)	$	11.05	(246)	$	20.00
Expired or canceled	—	$	—	—	$	—
Outstanding at June 30, 2021	1,327	$	16.50	389	$	25.07
Exercisable at June 30, 2021	1,179	$	16.13

(1)Represents weighted average market value of the shares; awards are granted at no cost to the recipients.

The following table presents our PSU award activity during the six months ended June 30, 2021 (in thousands, except per share data):

	Performance Share Units	Weighted Average Grant-Date Fair Value Per Unit (1)
Outstanding at beginning of year	307	$	22.18
Granted	140	$	27.56
Vested	—	$	—
Adjustments for performance results	—	$	—
Canceled	—	$	—
Outstanding at June 30, 2021	447	$	23.86

(1)Represents weighted average market value of the performance share units; PSUs are granted at no cost to the recipients.