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Stock-Based Compensation (Tables)
3 Months Ended
Mar. 31, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary Of PSU Transactions

Number

Weighted

of

Average

Share Units

Fair Value

Nonvested share units at beginning of period

531,437

$

40.03

Granted

226,971

38.10

Performance criteria adjustment

(142,772)

30.22

Actual vested

(96,425)

43.40

Forfeited

(4,271)

42.63

Nonvested share units at end of period

514,940

41.25

Summary Of RSU Transactions

Number

Weighted

of

Average

Stock Units

Fair Value

Nonvested stock units at beginning of period

192,217

$

45.06

Granted

102,306

36.60

Stock units vested and issued

(63,982)

44.45

Forfeited

(1,600)

42.40

Nonvested stock units at end of period

228,941

41.46

Assumptions Used In The Pricing Model

2024

2023

Expected term (years)

5.5

5.5

Risk-free interest rate

4.00%

4.03%

Expected volatility

28.30%

27.80%

Dividend yield

3.43%

2.53%

Grant date fair value per option

$

8.12

$

11.37

Summary Of Stock Option Transactions

Weighted

Weighted

Average

Average

Aggregate

Exercise

Remaining

Intrinsic

Shares

Price

Life (years)

Value

Outstanding at beginning of period

882,442

$

37.03

Granted

119,548

35.78

Expired

(527)

35.94

Exercised

(4,971)

35.25

Outstanding at end of period

996,492

$

36.89

5.8

$

1,380

Exercisable at end of period

803,853

$

36.29

5.0

$

1,228

Summary Of Restricted Stock Transactions

Number

Weighted

of

Average

Shares

Fair Value

Nonvested restricted stock at beginning of period

1,412

$

35.42

Granted

-

-

Vested

-

-

Nonvested restricted stock at end of period

1,412

$

35.42

Performance Share Units [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary Of Compensation Costs

Three Months Ended

March 31,

2024

2023

Stock-based compensation within operations and maintenance expenses

$

106

$

2,443

Income tax benefit

26

612

Restricted Stock Units [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary Of Compensation Costs

Three Months Ended

March 31,

2024

2023

Stock-based compensation within operations and maintenance expenses

$

846

$

681

Income tax benefit

211

171

Stock Options [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary Of Compensation Costs

Three Months Ended

March 31,

2024

2023

Stock-based compensation within operations and maintenance expenses

$

131

$

77

Income tax benefit

33

19

Restricted Stock [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary Of Compensation Costs

Three Months Ended

March 31,

2024

2023

Stock-based compensation within operations and maintenance expenses

$

12

$

12

Income tax benefit

3

3

Stock Awards [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary Of Compensation Costs

Three Months Ended

March 31,

2024

2023

Stock-based compensation within operations and maintenance expenses

$

-

$

210

Income tax benefit

-

59