XML 43 R33.htm IDEA: XBRL DOCUMENT v3.21.2
Stock-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2021
Share-based Payment Arrangement [Abstract]  
Stock-Based Compensation Expense and Related Tax Benefit
Total stock-based compensation expense and the related tax benefit were as follows:
Three Months Ended June 30,Six Months Ended June 30,
In thousands2021202020212020
Stock options$371 $526 $711 $993 
Restricted stock units5,511 6,367 11,442 14,176 
Unrestricted stock awards206 206 433 412 
Phantom stock units1,225 1,060 2,342 1,493 
Total stock-based compensation$7,313 $8,159 $14,928 $17,074 
Related tax benefit$1,318 $1,420 $2,681 $3,187 
Employee Stock Options Activity
A summary of our stock option activity is as follows:
SharesWeighted
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, 2020458 $56.38 7.0$12,641 
Granted73 87.27 $26.72 
Exercised(47)51.52 1,131 
Outstanding, June 30, 2020484 $61.48 7.3$4,871 
Outstanding, January 1, 2021433 $61.95 6.9$14,697 
Granted— $— 
Exercised(31)66.97 1,121 
Forfeited(6)83.33 
Outstanding, June 30, 2021396 $61.25 6.4$15,349 
Exercisable, June 30, 2021288 $54.75 5.6$13,048 
Stock Options, Valuation Assumptions
The weighted average assumptions used to estimate the fair value of stock options granted and the resulting weighted average fair value are as follows:
Six Months Ended June 30,
20212020
Expected volatility— %31.0 %
Risk-free interest rate— %1.4 %
Expected term (years)N/A5.3
Restricted Stock Units Award Activity
The following table summarizes restricted stock unit activity:
In thousands, except fair valueNumber of
Restricted Stock Units		Weighted
Average Grant
Date Fair Value		Aggregate
Intrinsic Value
Outstanding, January 1, 2020684 
Granted189 $85.97 
Released (1)
(230)$2,506 
Forfeited(13)
Outstanding, June 30, 2020630 
Outstanding, January 1, 2021544 $71.79 
Granted203 98.94 
Released (1)
(194)73.35 $19,474 
Forfeited(33)73.65 
Outstanding, June 30, 2021520 81.98 
Vested but not released, June 30, 202110 $989 
(1)     Shares released is presented as gross shares and does not reflect shares withheld by us for employee payroll tax obligations.
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:
Six Months Ended June 30,
20212020
Expected volatility50.5 %37.6 %
Risk-free interest rate0.2 %1.5 %
Expected term (years)2.91.8
Weighted average fair value$113.75 $94.28