Stock Plans (Tables)

12 Months Ended

Dec. 31, 2022

Share-Based Payment Arrangement [Abstract]

Schedule of Stock-Based Compensation Expense

Stock-based compensation expense was as follows:

(In thousands)	2022		2021		2020
Restricted stock units	$	6,488	$	5,797	$	6,258
Stock options	49		81		113
Performance stock units	13,113		13,030		549
Total stock-compensation expense before income taxes	19,650		18,908		6,920
Income tax benefit	4,814		4,633		1,668
Total stock-compensation expense, net of income tax benefit	$	14,836	$	14,275	$	5,252

Summary of Option Activity

A summary of option activity follows:

	Shares	Weighted Average Exercise Price		Exercisable at Year-end
Outstanding January 1, 2020	559,656	$	45.78
Exercised	(274,704)	45.31
Forfeited	(954)	42.00
Outstanding December 31, 2020	283,998	46.23		281,593
Exercised	(122,087)	47.25
Forfeited	(210)	43.75
Outstanding December 31, 2021	161,701	45.47		161,347
Exercised	(103,545)	44.91
Outstanding December 31, 2022	58,156	$	46.48	58,156

Characteristics of Outstanding and Exercisable Stock Options

For various exercise price ranges, characteristics of outstanding and exercisable stock options at December 31, 2022 were as follows:

	Stock Options Outstanding
Range of Exercise Prices	Shares	Weighted-Average
		Exercise Price		Remaining Life
$33.01 – $45.00	33,148	$	44.50	2.41
$45.01 – $57.93	25,008	49.10		2.21
$33.01 – $57.93	58,156	$	46.48	2.32

	Stock Options Exercisable
Range of Exercise Prices	Shares	Weighted-Average
		Exercise Price		Remaining Life
$33.01 – $45.00	33,148	$	44.50	2.41
$45.01 – $57.93	25,008	49.10		2.21
$33.01 – $57.93	58,156	$	46.48	2.32

Summary of Restricted Stock Unit Activity

A summary of restricted stock unit activity follows:

	Shares	Weighted Average Grant Date Fair Value
Unvested January 1, 2020	172,701	$	90.38
Granted	51,468	124.61
Vested	(70,399)	81.58
Forfeited	(7,579)	106.54
Unvested at December 31, 2020	146,191	105.83
Granted	43,146	167.13
Vested	(65,225)	95.43
Forfeited	(5,769)	132.54
Unvested at December 31, 2021	118,343	132.62
Granted	87,697	130.28
Vested	(51,369)	113.96
Forfeited	(8,785)	139.66
Unvested at December 31, 2022	145,886	$	137.36

Summary of Performance Stock Unit Activity

A summary of performance stock unit activity follows:

	Shares	Weighted Average Grant Date Fair Value
Unvested at January 1, 2020	238,035	$	85.39
Granted	67,479	127.48
Vested	(132,036)	73.00
Performance adjustments	33,499	72.36
Forfeited	(6,765)	111.60
Unvested at December 31, 2020	200,212	104.69
Granted	52,309	175.59
Vested	(64,543)	85.41
Performance adjustments	5,357	88.45
Unvested at December 31, 2021	193,335	129.86
Granted	81,504	142.38
Vested	(55,447)	101.38
Performance adjustments	(22,147)	99.84
Forfeited	(18,485)	147.66
Unvested at December 31, 2022	178,760	$	146.28