At June 30, 2022, we had five active stock-based compensation plans: the Non-Employee Directors’ Stock Retirement Plan (“Directors’ Plan”), the 2004 Omnibus Long-Term Incentive Plan (“2004 Plan”), the 2009 Omnibus Equity and Performance Incentive Plan (“2009 Plan”), the 2014 Performance and Incentive Compensation Plan (“2014 Plan”), and the 2018 Equity and Incentive Compensation Plan ("2018 Plan"). Future grants can only be made under the 2018 Plan.

These plans allow for grants of stock options, stock appreciation rights, restricted stock, restricted stock units ("RSUs"), performance shares, performance units, and other stock awards subject to the terms of the specific plans under which the awards are granted.

The following table summarizes the compensation expense included in selling, general and administrative expenses in the Condensed Consolidated Statements of Earnings related to stock-based compensation plans:


	Three months ended				Six months ended
	June 30,		June 30,		June 30,		June 30,
	2023		2022		2023		2022
Service-based RSUs	$	765	$	691	$	1,535	$	1,368
Performance-based RSUs		723		820		1,357		2,041
Cash-settled RSUs		161		105		343		157
Total	$	1,649	$	1,616	$	3,235	$	3,566
Income tax benefit		379		372		744		820
Net expense	$	1,270	$	1,244	$	2,491	$	2,746

The following table summarizes the unrecognized compensation expense related to non-vested RSUs by type and the weighted-average period in which the expense is to be recognized:


	Unrecognized
	Compensation		Weighted-
	Expense at		Average
	June 30, 2023		Period (years)
Service-based RSUs	$	2,993		1.47
Performance-based RSUs		5,252		1.88
Total	$	8,245		1.73

We recognize expense on a straight-line basis over the requisite service period for each separately vesting portion of the award as if the award was, in substance, multiple awards.

The following table summarizes the status of these plans as of June 30, 2023:


	2018 Plan		2014 Plan		2009 Plan		2004 Plan		Directors' Plan
Awards originally available		2,500,000		1,500,000		3,400,000		6,500,000	N/A
Maximum potential awards outstanding		787,638		35,100		30,000		14,545		4,722
RSUs and cash-settled awards vested and released		441,812		—		—		—		—
Awards available for grant		1,270,550		—		—		—		—

The following table summarizes the service-based RSU activity for the six months ended June 30, 2023:


	Units			Weighted Average Grant Date Fair Value
Outstanding at December 31, 2022		282,124		$	27.44
Granted		64,046			43.77
Vested and released		(68,848	)		32.30
Forfeited		(7,540	)		36.97
Outstanding at June 30, 2023		269,782		$	29.81
Releasable at June 30, 2023		131,867		$	20.30

The following table summarizes the performance and market-based RSU activity for the six months ended June 30, 2023:


	Units			Weighted Average Grant Date Fair Value
Outstanding at December 31, 2022		260,306		$	33.20
Granted		71,832			43.80
Attained by performance		53,035			32.11
Released		(113,385	)		32.11
Forfeited		(10,429	)		37.59
Outstanding at June 30, 2023		261,359		$	36.19
Releasable at June 30, 2023		—		$	—

Cash-Settled RSUs entitle the holder to receive the cash equivalent of one share of common stock for each unit when the unit vests. These RSUs are issued to key employees residing in foreign locations as direct compensation. Generally, these RSUs vest over a three-year period. Cash-Settled RSUs are classified as liabilities and are remeasured at each reporting date until settled. At June 30, 2023 and December 31, 2022, we had 49,347 and 46,641 Cash-Settled RSUs outstanding, respectively. At June 30, 2023 and December 31, 2022, liabilities of $547 and $566, respectively, were included in accrued expenses and other liabilities on our Condensed Consolidated Balance Sheets.