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Share-Based Payments (Tables)
9 Months Ended
Sep. 30, 2020
Share-based Payment Arrangement, Option [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share-based Payment Arrangement, Activity [Table Text Block] The weighted-average fair value of options granted and assumptions used to estimate their fair value during the nine months ended September 30, 2020 were as follows (on a continuing basis):
Nine months ended
September 30, 2020
Expected dividend yield1.1 %
Expected stock price volatility24.1 %
Weighted average risk-free interest rate1.5 %
Expected life of options (years)5.9
Weighted average grant date fair value$15 

The following tables summarize the Company’s employee stock option activity and related information on a continuing basis:
Nine months ended September 30, 2020
Weighted-
Weighted-Average
AverageAggregateRemaining
ExerciseIntrinsicContractual
OptionsPriceValueTerm
Outstanding at December 31, 2019417 $53 
Granted36 66 
Exercised(42)46 
Forfeited(4)60 
Outstanding at September 30, 2020407 $55 $(133)3.8
Exercisable at September 30, 2020311 $53 $682 3.4
Nine months ended
September 30,
2020
September 30,
2019
Share-based compensation for options$869 $1,178 
Tax benefit for option compensation$225 $304 
Unrecognized compensation cost for options$1,065 $1,846 
Weighted average period over which unrecognized compensation will be recognized (years)1.4

The following tables summarize the Company’s employee stock option activity and related information on a discontinued basis:
Nine months ended September 30, 2020
Weighted-
Weighted-Average
AverageAggregateRemaining
ExerciseIntrinsicContractual
OptionsPriceValueTerm
Outstanding at December 31, 201914 $52 
Granted— — 
Exercised— — 
Forfeited— — 
Outstanding at September 30, 202014 $52 $37 3.0
Exercisable at September 30, 202012 $52 $41 2.9

Nine months ended
September 30,
2020
September 30,
2019
Share-based compensation for options$16 $31 
Tax benefit for option compensation$$
Unrecognized compensation cost for options$$32 
Weighted average period over which unrecognized compensation will be recognized (years)0.4
Employee Non-vested Shares [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] The following tables summarize the Company’s employee non-vested share activity and related information on a continuing basis:
Nine months ended September 30, 2020
Weighted-
AverageAggregate
Non-vestedGrant DateGrant Date
SharesFair ValueFair Value
Outstanding and non-vested at December 31, 2019264 $58 
Granted114 66 
Vested(149)57 
Forfeited(16)62 
Outstanding and non-vested at September 30, 2020213 $63 $13,409 
Nine months ended
September 30,
2020
September 30,
2019
Share-based compensation for non-vested shares$5,416 $5,934 
Tax benefit for non-vested share compensation$1,399 $1,510 
Unrecognized compensation cost for non-vested shares$9,397 $10,243 
Weighted average period over which unrecognized compensation will be recognized (years)1.9

The following tables summarize the Company’s employee non-vested share activity and related information on a discontinued basis:
Nine months ended September 30, 2020
Weighted-
AverageAggregate
Non-vestedGrant DateGrant Date
SharesFair ValueFair Value
Outstanding and non-vested at December 31, 201913 $58 
Granted63 
Vested(8)58 
Forfeited— — 
Outstanding and non-vested at September 30, 202011 $61 $678 

Nine months ended
September 30,
2020
September 30,
2019
Share-based compensation for non-vested shares$282 $276 
Tax benefit for non-vested share compensation$73 $71 
Unrecognized compensation cost for non-vested shares$471 $462 
Weighted average period over which unrecognized compensation will be recognized (years)1.9
Key Employee Performance Share Based Plan [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share-based Compensation Arrangements by Share-based Payment Award, Performance-Based Units, Vested and Expected to Vest [Table Text Block] The fair value of the performance shares granted based on the three-year performance of the Company’s total shareholder return was estimated using a Monte Carlo simulation. The following table contains the weighted-average assumptions, on both a continuing and discontinued basis, used to estimate the fair value of performance shares granted using the Monte Carlo simulation. These assumptions are subjective and changes in these assumptions can materially affect the fair value estimate.
Nine months ended
September 30,
2020
September 30,
2019
Expected stock price volatility23.5 %23.4 %
Weighted average risk-free interest rate1.4 %2.5 %

The following tables summarize the Company’s employee performance share activity, assuming median share awards, and related information on a continuing basis:
Nine months ended September 30, 2020
Weighted-
AverageAggregate
PerformanceGrant DateGrant Date
SharesFair ValueFair Value
Outstanding and non-vested at December 31, 201958 $62 
Granted38 69 
Additional shares awarded based on performance13 51 
Vested(33)51 
Forfeited(11)66 
Outstanding and non-vested at September 30, 202065 $68 $4,425 
Nine months ended
September 30,
2020
September 30,
2019
Share-based compensation for performance shares$1,007 $767 
Tax benefit for performance share compensation$260 $198 
Unrecognized compensation cost for performance shares$2,466 $1,766 
Weighted average period over which unrecognized compensation will be recognized (years)2.1

The following tables summarize the Company’s employee performance share activity, assuming median share awards, and related information on a discontinued basis:
Nine months ended September 30, 2020
Weighted-
AverageAggregate
PerformanceGrant DateGrant Date
SharesFair ValueFair Value
Outstanding and non-vested at December 31, 2019$62 
Granted69 
Additional shares awarded based on performance51 
Vested(2)51 
Forfeited— — 
Outstanding and non-vested at September 30, 2020$66 $275 

Nine months ended
September 30,
2020
September 30,
2019
Share-based compensation for performance shares$62 $54 
Tax benefit for performance share compensation$16 $14 
Unrecognized compensation cost for performance shares$142 $118 
Weighted average period over which unrecognized compensation will be recognized (years)1.9
Employee Stock Purchase Plan [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Share-based Compensation, Employee Stock Purchase Plan, Activity [Table Text Block] The following table summarizes the Company's employee stock purchase activity and related information on a continuing basis:
Nine months ended
September 30,
2020
September 30,
2019
Shares purchased by participants under plan
Average purchase price$45 $49 
Weighted-average fair value of each purchase right under the ESPP granted ¹$$10 
Share-based compensation for ESPP shares$30 $46 
¹ Equal to the discount from the market value of the common stock at the end of each six month purchase period

The following table summarizes the Company's employee stock purchase activity and related information on a discontinued basis:
Nine months ended
September 30,
2020
September 30,
2019
Shares purchased by participants under plan
Average purchase price$45 $49 
Weighted-average fair value of each purchase right under the ESPP granted ¹$$10 
Share-based compensation for ESPP shares$$
¹ Equal to the discount from the market value of the common stock at the end of each six month purchase period
Nonemployee Director Nonvested Shares Granted Member  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] The following tables summarize the Company’s non-employee non-vested share activity and related information on a continuing basis:
Nine months ended September 30, 2020
Weighted-
AverageAggregate
Non-vestedGrant DateGrant Date
SharesFair ValueFair Value
Outstanding and non-vested at December 31, 201916 $62 
Granted24 43 
Vested(16)62 
Forfeited— — 
Outstanding and non-vested at September 30, 202024 $43 $1,035 
Nine months ended
September 30,
2020
September 30,
2019
Share-based compensation for non-vested shares$766 $714 
Tax benefit for non-vested share compensation$198 $184 
Unrecognized compensation cost for non-vested shares$636 $554 
Weighted average period over which unrecognized compensation will be recognized (years)0.6