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Share-Based Compensation and Capital Stock (Tables)
12 Months Ended
Dec. 31, 2023
Share-Based Payment Arrangement [Abstract]  
Schedule of Weighted Average Assumptions of Black-Scholes Option-Pricing Model The fair value of the options granted was estimated on the grant date using the Black-Scholes option-pricing model with the following weighted average assumptions:
 
202320222021
Risk-free interest rate4.10 %2.01 %0.94 %
Expected volatility30.90 %29.46 %29.23 %
Expected life of stock option6.0 years5.9 years5.9 years
Dividend yield0.90 %0.66 %0.82 %
Requisite service period4 years4 years4 years
Contractual life10 years10 years10 years
Weighted average fair value of the stock options granted (per stock option)$42.59 $42.66 $28.00 
Schedule of Options Outstanding and Exercisable
The following table summarizes information about the stock options outstanding as of December 31, 2023:
 Options OutstandingOptions Exercisable
Range of Exercise PricesNumber Outstanding at December 31, 2023Weighted Average
Remaining
Contractual Life
(in Years)
Weighted
Average
Exercise Price
Number Exercisable at December 31, 2023Weighted
Average
Exercise Price
$55.01 to $65.00
62,946 0.2$60.74 62,946 $60.74 
$65.01 to $85.00
211,358 1.881.30 211,358 81.30 
$85.01 to $91.28
153,692 6.291.28 115,257 91.28 
$91.29 to $104.87
267,361 7.2104.87 133,206 104.87 
$104.88 to $117.98
16,667 8.6117.98 4,166 117.98 
$117.99 to $146.68
231,617 8.5138.42 37,071 146.68 
943,641 5.7$102.90 564,004 $91.18 
Schedule of Activity Related to Restricted Stock Grants
The following table is a summary of the activity related to restricted stock grants:
For the Year Ended December 31,
202320222021
Restricted shares granted65,991 273,777 61,009 
Weighted average grant date fair value per share$123.65 $143.76 $111.25 
Aggregate grant date fair value (in thousands)$8,160 $39,357 $6,787 
Restricted shares forfeited13,202 14,443 19,209 
Vesting service period for the restricted shares granted
9 - 48 months
9 - 60 months
9 - 48 months
Fair value of the restricted shares vested (in thousands)$11,134 $13,784 $11,927 
Schedule of Activity Related to PVRSU Grants
The following table is a summary of the activity related to the PVRSU grants:
For the Years Ended December 31,
202320222021
PVRSUs granted at target110,636 111,585 98,544 
Weighted average grant date fair value per share$128.71 $181.91 $108.75 
Aggregate grant date fair value (in thousands)$14,240 $20,298 $10,716 
PVRSUs forfeited & expired16,504 83,563 78,500 
Requisite service period
9 - 48 months
9 - 60 months
9 - 60 months
Schedule of Change in Stock-Based Award Activity
For the years ended December 31, 2023, 2022, and 2021, the following tables present a summary of the share-based award activity during those respective years:
2023
Stock OptionsRestricted StockPerformance Vested
Restricted Stock Units
OptionsWeighted Average Exercise PriceWeighted
Average
Remaining Contractual
Life
SharesWeighted
Average Grant
Date Fair Value
SharesWeighted
Average Grant
Date Fair Value
Outstanding as of January 1, 20231,010,647 $94.97 399,099 $128.47 437,180 $140.05 
Granted88,733 123.62 65,991 123.65 110,636 128.71 
Performance-based leveraging*    46,934 139.47 
Exercised/vested(143,357)57.72 (90,220)96.14 (119,751)145.41 
Expired(1,054)146.68     
Forfeited(11,328)124.94 (13,202)(118.56)(16,504)131.91 
Outstanding as of December 31, 2023943,641 $102.90 5.6 years361,668 $136.05 458,495 $136.14 
Options exercisable as of December 31, 2023564,004 $91.18 4.3 years
* The outstanding PVRSUs have been adjusted by 46,934 net units during the year ended December 31, 2023, due to an increase in the outstanding PVRSUs as a result of the Company exceeding the targeted performance conditions.
2022
Stock OptionsRestricted StockPerformance Vested
Restricted Stock Units
OptionsWeighted Average Exercise PriceWeighted
Average
Remaining Contractual
Life
SharesWeighted
Average Grant
Date Fair Value
SharesWeighted
Average Grant
Date Fair Value
Outstanding as of January 1, 2022910,944 $83.14 236,599 $92.60 412,642 $114.70 
Granted172,441 143.91 273,777 143.76 111,585 181.91 
Performance-based leveraging*— — — — (3,484)121.34 
Exercised/vested(66,192)57.55 (96,834)87.34 — — 
Expired(986)51.49 — — (78,370)81.15 
Forfeited(5,560)128.86 (14,443)106.35 (5,193)132.06 
Outstanding as of December 31, 20221,010,647 $94.97 5.6 years399,099 $128.47 437,180 $140.05 
Options exercisable as of December 31, 2022523,856 $76.77 3.3 years
* The outstanding PVRSUs have been adjusted by 3,484 net units during the year ended December 31, 2022, due to a decrease in the outstanding PVRSUs as a result of the Company partially meeting the targeted performance conditions, partially offset by an increase in the outstanding PVRSUs due to the Company exceeding the targeted performance conditions for the PVRSUs that were granted in prior periods.

2021
Stock OptionsRestricted StockPerformance Vested
Restricted Stock Units
OptionsWeighted Average Exercise PriceWeighted
Average
Remaining Contractual
Life
SharesWeighted
Average Grant
Date Fair Value
SharesWeighted
Average Grant
Date Fair Value
Outstanding as of January 1, 2021819,610 $70.48 304,439 $84.48 321,752 $109.25 
Granted280,811 104.87 61,009 111.25 98,544 108.75 
Performance-based leveraging*— — — — 74,832 107.51 
Exercised/vested(185,437)59.61 (109,640)80.83 (3,986)81.55 
Expired— — — — (72,944)81.55 
Forfeited(4,040)104.87 (19,209)90.23 (5,556)55.76 
Outstanding as of December 31, 2021910,944 $83.14 5.5 years236,599 $92.60 412,642 $114.70 
Options exercisable as of December 31, 2021421,592 $67.09 2.8 years
* The outstanding PVRSUs were increased by 74,832 units during the year ended December 31, 2021, due to the Company exceeding the targeted performance conditions contained in the PVRSUs that were granted in prior periods.
Schedule of Pre-Tax Stock-Based Compensation Expenses and Associated Income Tax Benefits
The components of the Company’s share-based compensation expense were as follows:
For the Year Ended December 31,
(in thousands)202320222021
Stock options$5,816 $4,674 $3,396 
Restricted stock awards13,774 14,349 9,281 
Performance vested restricted stock units20,924 21,436 10,703 
Total share-based compensation expense$40,514 $40,459 $23,380 
Schedule of Unrecognized Compensation Cost, Nonvested Awards
The following table as of December 31, 2023 is a summary of the total unrecognized compensation expense related to the share-based awards that have not yet vested and the related weighted average amortization periods over which the compensation expense will be recognized:
(in thousands)Unrecognized Compensation Expense on Unvested AwardsWeighted Average Remaining Amortization Period
Stock options$7,952 2.1 years
Restricted stock awards30,350 2.9 years
Performance vested restricted stock units25,634 2.1 years
Total$63,936