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STOCKHOLDERS' EQUITY (Tables)
 9 Months Ended
Sep. 30, 2021
Stockholders' Equity Note [Abstract]  
Schedule of Compensation Cost on Net Earnings
The Company’s results for the three and nine months ended September 30, 2021 and 2020 reflected the following stock-based compensation cost, and such compensation cost had the following effects on net earnings:
Increase/(Decrease) for theIncrease/(Decrease) for the
Three Months Ended September 30,Nine Months Ended September 30,
2021202020212020
Cost of sales$444 $320 $1,188 $895 
Operating expenses2,451 1,935 7,621 5,860 
Net earnings(2,232)(1,718)(6,801)(5,137)
Schedule of Stock Option Activity
Option activity for the nine months ended September 30, 2021 and 2020 is summarized below:
For the nine months ended September 30, 2021Shares (000s)Weighted
Average
Exercise
Price		Aggregate
Intrinsic
Value		Weighted
Average
Remaining
Contractual
Term
Outstanding as of December 31, 2020858 $80.58 $29,735 
Granted129 119.12 
Exercised(100)63.49 
Forfeited(10)106.93 
Canceled(1)74.57 
Outstanding as of September 30, 2021876 $87.91 $50,090 6.6
Exercisable as of September 30, 2021540 $74.81 $37,961 5.5
For the nine months ended September 30, 2020 Shares (000s)Weighted
Average
Exercise
Price		Aggregate
Intrinsic
Value		Weighted
Average
Remaining
Contractual
Term
Outstanding as of December 31, 2019951 $68.18 $31,814 
Granted150 111.51 
Exercised(159)51.51 
Forfeited(10)94.27 
Canceled— — 
Outstanding as of September 30, 2020932 $77.72 $20,638 6.5
Exercisable as of September 30, 2020589 $67.66 $17,644 5.2
Schedule of Other Information Pertaining to Stock Option Activity
Other information pertaining to option activity during the three and nine months ended September 30, 2021 and 2020 was as follows:
 Three Months Ended
September 30,		Nine Months Ended
September 30,
 2021202020212020
Weighted-average fair value of options granted$— $28.59 $33.11 $23.24 
Total intrinsic value of stock options exercised ($000s)$3,196 $1,517 $6,927 $7,888 
Schedule of Non-vested Restricted Stock Activity
Non-vested restricted stock activity for the nine months ended September 30, 2021 and 2020 is summarized below:
Nine Months Ended September 30,
20212020
Shares (000s)Weighted
Average Grant
Date Fair
Value		Shares (000s)Weighted
Average Grant
Date Fair
Value
Non-vested balance as of December 31159 $90.71 138 $80.03 
Granted38 119.59 38 109.95 
Vested(16)86.79 (21)67.60 
Forfeited(5)95.71 (4)93.35 
Non-vested balance as of September 30176 $97.17 151 $89.45 
Schedule of Non-vested Performance Share Activity
Non-vested performance share activity for the nine months ended September 30, 2021 and 2020 is summarized below:
Nine Months Ended September 30,
20212020
Shares (000s)Weighted
Average Grant
Date Fair
Value		Shares (000s)Weighted
Average Grant
Date Fair
Value
Non-vested balance as of December 3171 $91.99 70$81.26 
Granted36 108.74 20126.46
Vested(24)70.64 (8)104.15
Forfeited(11)74.57 (11)82.71
Non-vested balance as of September 3072 $110.22 71$91.99