Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2023

Share-Based Payment Arrangement, Noncash Expense [Abstract]

Stock-Based Compensation Expense and Related Tax Benefit

Total stock-based compensation expense and the related tax benefit were as follows:

	Year Ended December 31,
In thousands	2023		2022		2021
Stock options	$	103	$	891	$	1,371
Restricted stock units	27,189		20,038		21,391
Unrestricted stock awards	1,065		952		856
Phantom stock units	5,025		1,315		3,242
Total stock-based compensation	$	33,382	$	23,196	$	26,860
Related tax benefit	$	6,928	$	5,371	$	4,991

Employee Stock Options Activity

A summary of our stock option activity is as follows:

	Shares	Weighted Average Exercise Price per Share		Weighted Average Remaining Contractual Life	Aggregate Intrinsic Value		Weighted Average Grant Date Fair Value
	In thousands			Years	In thousands
Outstanding, January 1, 2021	433	$	61.95	6.9	$	14,697
Granted	—	—					$	—
Exercised	(34)	67.21			1,215
Forfeited	(6)	83.33
Outstanding, December 31, 2021	393	$	61.18	5.9	$	4,737
Granted	—	—					$	—
Exercised	(1)	45.90			4
Forfeited	(2)	87.27
Canceled	(9)	80.00
Outstanding, December 31, 2022	381	$	60.63	4.8	$	1,892
Granted	—	—					$	—
Exercised	(18)	45.96			397
Forfeited	—	—
Canceled	—	—
Outstanding and Exercisable, December 31, 2023	363	$	61.36	4.0	$	5,886

Restricted Stock Units Award Activity

The following table summarizes restricted stock unit activity:

	Number of Restricted Stock Units	Weighted Average Grant Date Fair Value		Aggregate Intrinsic Value
	In thousands			In thousands
Outstanding, January 1, 2021	544	$	71.79
Granted	230	97.66
Released (1)	(293)			$	20,639
Forfeited	(51)
Outstanding, December 31, 2021	430	$	85.77
Granted	391	53.33
Released (1)	(227)			$	18,169
Forfeited	(66)
Outstanding, December 31, 2022	528	$	66.39
Granted	497	56.89
Released (1)	(242)	71.64		$	13,974
Forfeited	(32)	61.59
Outstanding, December 31, 2023	751	$	58.89
Vested but not released, December 31, 2023	15	$	75.51	$	1,159

Restricted Stock Units, Valuation Assumptions

The weighted average assumptions used to estimate the fair value of performance-based restricted stock units granted with a service and market condition and the resulting weighted average fair value are as follows:

	Year Ended December 31,
	2023			2022			2021
Expected volatility	46.0		%	55.7		%	54.2		%
Risk-free interest rate	4.6		%	1.7		%	0.4		%
Expected term (years)	1.9			2.9			1.9
Weighted average fair value	$	73.41		$	57.88		$	77.65

Schedule of Other Share-based Compensation, Activity

The following table summarizes phantom stock unit activity:

	Number of Phantom Stock Units	Weighted Average Grant Date Fair Value		Aggregate Intrinsic Value
	In thousands			In thousands
Outstanding, January 1, 2021	82	$	73.13
Granted	35	96.49
Released	(41)			$	4,100
Forfeited	(7)
Outstanding, December 31, 2021	69	$	85.47
Granted	59	53.07
Released	(34)			$	1,780
Forfeited	(9)
Outstanding, December 31, 2022	85	$	66.46
Granted	77	56.52
Released	(43)	69.85		$	2,511
Forfeited	(4)	66.19
Outstanding, December 31, 2023	115	$	58.58