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Share-Based Compensation (Tables)
 9 Months Ended
Sep. 30, 2021
Share-based Payment Arrangement [Abstract]  
Schedule of Weighted Average Option Fair Values and Assumptions Weighted average option fair values and assumptions for the periods specified are disclosed below. The fair value of each option grant was estimated on the date of the grant using the Binomial lattice option pricing model (for options granted before March 2021) or the Black Scholes valuation model (for options granted after February 2021).
 Three Months Ended September 30,Nine Months Ended September 30,
 2021202020212020
Weighted average fair value of grants$45.44$31.60$38.86$34.22
Dividend yield0.96%1.18%1.01%1.15%
Volatility24.60%23.71%23.77%22.04%
Risk-free interest rate
0.71% - 0.82%
0.14% - 0.70%
0.12% - 1.54%
1.40% - 1.66%
Expected life (in years)4.905.815.705.80
Schedule of Compensation Cost for Stock Options
Total compensation cost for stock options is as follows:
 Three Months Ended September 30,Nine Months Ended September 30,
 2021202020212020
Cost of goods sold$100 $107 $436 $389 
Selling, general and administrative expenses1,789 2,177 6,269 7,449 
Total expense before income taxes1,889 2,284 6,705 7,838 
Income tax benefit(180)(216)(628)(801)
Total expense after income taxes$1,709 $2,068 $6,077 $7,037 
Schedule of Stock Option Activity
A summary of the Company’s stock option activity as of September 30, 2021 and changes during the nine months ended September 30, 2021 are presented in the following table:
Stock OptionsSharesWeighted
Average
Price		Weighted-Average
Remaining
Contractual Term		Aggregate
Intrinsic
Value
Outstanding at January 1, 2021963,726 $125.70 6.94$70,829,529 
Granted278,605 198.21 
Exercised(131,685)111.07 
Forfeited(37,979)165.68 
Outstanding at September 30, 20211,072,667 $144.92 7.07$66,728,398 
Vested and expected to vest as of September 30, 20211,021,851 $142.97 6.98$65,520,705 
Exercisable at September 30, 2021495,853 $106.25 5.28$49,933,371 
Schedule of Restricted Stock Activity A summary of the Company’s restricted stock activity as of September 30, 2021 and changes during the nine months ended September 30, 2021 are presented as follows:
Restricted StockSharesWeighted-Average
Grant Date Fair
Value
Unvested at January 1, 2021111,300 $147.13 
Granted37,985 205.64 
Vested(28,874)137.25 
Forfeited(6,735)169.41 
Unvested at September 30, 2021113,676 $168.24 
Schedule of Compensation Cost for Restricted Stock
Total compensation cost for restricted stock awards is as follows:
 Three Months Ended September 30,Nine Months Ended September 30,
 2021202020212020
Cost of goods sold$85 $69 $318 $255 
Selling, general and administrative expenses1,290 963 3,856 2,809 
Total expense before income taxes1,375 1,032 4,174 3,064 
Income tax benefit(264)(217)(846)(643)
Total expense after income taxes$1,111 $815 $3,328 $2,421 
Schedule of Unvested Cash-settled Restricted Stock Activity Cash-settled restricted stock awards are recorded at fair value on a quarterly basis using the market price of the Company’s stock on the last day of the quarter. A summary of the Company’s unvested cash-settled restricted stock activity as of September 30, 2021 and changes during the nine months ended September 30, 2021 are presented in the following table:
Cash-Settled Restricted StockSharesWeighted-Average
Fair Value
Unvested at January 1, 202163,940 $199.20 
Granted22,385 198.85 
Vested(22,921)199.51 
Forfeited(3,930)206.95 
Unvested at September 30, 202159,474 $206.95 
Schedule of Compensation Cost for Unvested Cash-settled Restricted Stock Total compensation cost for cash-settled restricted stock is as follows:
 Three Months Ended September 30,Nine Months Ended September 30,
 2021202020212020
Cost of goods sold$60 $283 $414 $595 
Selling, general and administrative expenses364 1,319 2,695 2,433 
Total expense before income taxes424 1,602 3,109 3,028 
Income tax benefit(21)(150)(233)(286)
Total expense after income taxes$403 $1,452 $2,876 $2,742 
Schedule of Weighted Average Performance Share Units Fair Values and Assumptions
Weighted average performance share unit fair values and assumptions for the period specified are disclosed below. The performance share units are market condition awards and have been assessed at fair value on the date of grant using a Monte Carlo simulation model.
 Nine Months Ended September 30,
20212020
Weighted average fair value of grants$247.49$224.14
Dividend yield—%—%
Volatility28.6%19.5%
Risk-free interest rate0.33%1.30%
Expected life (in years)2.932.94
Schedule of Performance Shares Units Activity
A summary of the Company’s performance share unit activity as of September 30, 2021 and changes during the nine months ended September 30, 2021 are presented in the following table:
Performance Share UnitsSharesWeighted-Average
Grant Date Fair
Value
Unvested at January 1, 202158,695 $218.16 
Granted29,020 247.49 
Vested— — 
Forfeited(5,850)212.44 
Unvested at September 30, 202181,865 $227.90 
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Total compensation cost for performance share units is as follows:
 Three Months Ended September 30,Nine Months Ended September 30,
2021202020212020
Cost of goods sold$— $— $— $— 
Selling, general and administrative expenses1,642 2,572 4,587 7,225 
Total expense before income taxes1,642 2,572 4,587 7,225 
Income tax benefit(84)(49)(195)(157)
Total expense after income taxes$1,558 $2,523 $4,392 $7,068