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Stock-Based Compensation (Tables)
9 Months Ended
Sep. 30, 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

227,284

38.10

Performance criteria adjustment

(155,959)

31.50

Share units issued

(96,425)

43.40

Forfeited

(46,419)

41.23

Nonvested share units at end of period

459,918

41.14

Summary Of RSU Transactions

Number

Weighted

of

Average

Stock Units

Fair Value

Nonvested stock units at beginning of period

192,217

$

45.06

Granted

104,661

36.61

Stock units vested and issued

(65,625)

44.42

Forfeited

(19,828)

41.36

Nonvested stock units at end of period

211,425

41.40

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

Forfeited

(17,917)

39.27

Expired

(7,103)

44.57

Exercised

(15,383)

34.94

Outstanding at end of period

961,587

$

36.81

5.2

$

2,598

Exercisable at end of period

786,865

$

36.24

4.5

$

2,296

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

Nine Months Ended

September 30,

September 30,

2024

2023

2024

2023

Stock-based compensation within operations and maintenance expenses

$

986

$

1,039

$

2,174

$

5,444

Income tax benefit

248

260

545

1,364

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

Three Months Ended

Nine Months Ended

September 30,

September 30,

2024

2023

2024

2023

Stock-based compensation within operations and maintenance expenses

$

508

$

746

$

2,078

$

2,186

Income tax benefit

128

187

521

548

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

Three Months Ended

Nine Months Ended

September 30,

September 30,

2024

2023

2024

2023

Stock-based compensation within operations and maintenance expenses

$

32

$

181

$

233

$

480

Income tax benefit

8

45

58

120

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

Three Months Ended

Nine Months Ended

September 30,

September 30,

2024

2023

2024

2023

Stock-based compensation within operations and maintenance expenses

$

13

$

12

$

37

$

37

Income tax benefit

3

3

10

10

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

Three Months Ended

Nine Months Ended

September 30,

September 30,

2024

2023

2024

2023

Stock-based compensation within operations and maintenance expenses

$

-

$

-

$

840

$

780

Income tax benefit

-

-

233

219

Summary Of Nonvested Share Activity

Number

Weighted

of

Average

Stock Awards

Fair Value

Nonvested stock awards at beginning of period

-

$

-

Granted

22,813

36.82

Vested

(22,813)

36.82

Nonvested stock awards at end of period

-

-