Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2021

Stock-Based Compensation [Abstract]

Summary of recognized stock-based compensation expense

The following table summarizes share-based compensation expense recognized:

	Years ended December 31,
	2021		2020		2019
Restricted stock units	$	6,396	$	5,061	$	5,931
Phantom stock units		209		215		177
Total	$	6,605	$	5,276	$	6,108

Summary of unrecognized compensation cost and weighted average remaining amortization periods

The following table summarizes unrecognized compensation cost and the weighted average remaining amortization periods at December 31, 2021 (amortization periods in years):

	Unrecognized Compensation Cost		Weighted Average Remaining Amortization Periods
Restricted stock units	$	3,400		0.9
Phantom stock units		-		0.0
Total	$	3,400

Restricted stock units activity

RSU activity is presented below (number of RSUs in thousands):

	Years ended December 31,
	2021					2020					2019
	Number of RSUs			Weighted Average Grant-date Fair Value		Number of RSUs			Weighted Average Grant-date Fair Value		Number of RSUs			Weighted Average Grant-date Fair Value
Outstanding:
Beginning of year		793		$	18.90		842		$	17.93		904		$	14.77
Granted		319			22.07		272			18.30		314			19.85
Vested*		(235	)		18.79		(308	)		15.70		(361	)		11.70
Cancelled or forfeited		-			-		(13	)		19.06		(15	)		17.71
End of year		877		$	20.08		793		$	18.90		842		$	17.93
Expected to vest		877					793					842

* The number of RSUs vested includes shares that the Company withheld on behalf of employees to satisfy statutory tax withholding requirements.

RSUs with performance-based vesting criteria

The number of performance-based RSUs scheduled to vest increases ratably based on the achievement of defined performance criteria between the established target and maximum levels.  RSUs with performance-based vesting criteria are expected to vest as follows (number of RSUs in thousands):

Vesting Date	Expected to Vest		Not Expected to Vest		Total
January 1, 2022**		174		-		174
January 1, 2023		152		-		152
January 1, 2024		165		-		165

** The performance vesting criteria for the performance-based RSUs with a vesting date of January 1, 2022 were achieved.

Phantom stock units activity under the 2007 Program

The following table summarizes the Company’s phantom stock units activity (number of phantom stock units in thousands):

	Years ended December 31,
	2021				2020				2019
	Number of Phantom Stock Units		Grant-date Fair Value per Unit		Number of Phantom Stock Units		Grant-date Fair Value per Unit		Number of Phantom Stock Units		Grant-date Fair Value per Unit
Outstanding:
Beginning of year		198				183				170
Granted		10	$	20.89		10	$	21.49		10	$	17.72
Dividend equivalents issued		4				5				3
End of year		212				198				183