XML 1089 R64.htm IDEA: XBRL DOCUMENT
v3.20.4

Stock Based Compensation (Details) - USD ($) $ / shares in Units, $ in Millions |  |  | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Number of Shares Authorized |  |  |  | 7,400,000 |  |  |
Tax Benefit from Compensation Expense |  |  |  | $ 2.5 |  | $ 3.6 | $ 3.4
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted |  |  |  | 247,252 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted |  |  |  | 247,252 |  |  |
Minimum payout range |  |  |  | 0.00% |  |  |
Maximum payout range |  |  |  | 200.00% |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted |  |  |  | 247,252 |  |  |
Total Compensation Cost Not yet Recognized |  |  |  | $ 8.7 |  |  |
Treasury Stock, Shares, Acquired |  |  |  | 405,000 |  |  |
Treasury Stock Acquired, Average Cost Per Share |  | $ 33.14 | $ 38.04 |  |  |  |
Og and E [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Tax Benefit from Compensation Expense |  |  |  | $ 0.8 |  | $ 1.3 | $ 1.2
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |  |  |  |
Total Compensation Cost Not yet Recognized |  |  |  | $ 2.2 |  |  |
Performance Units Related to Earnings Per Share [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted |  |  |  | 0 |  |  | 87,308
Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value |  |  |  | $ 0 |  | $ 31.03 |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number |  |  |  | 79,002 |  | 155,171 |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted |  |  |  | 0 |  |  | 87,308
Equity Instruments Other than Options, Converted in Period | [1] |  |  | (74,053) |  |  |
Equity Instruments Other than Options, Forfeited in Period |  |  |  | (2,116) |  |  |
Awards Other than Options, Fully Vested |  |  |  | 79,002 |  |  |
Equity Instruments Other than Options, Converted, Aggregrate Intrinsic Value |  |  |  | $ 6.6 |  |  |
Equity Instruments Other than Options, Vested in Period, Aggregate Intrinsic Value |  |  |  | (2.7) |  |  |
Equity Instruments Other than Options, Outstanding, Aggregrate Intrinsic Value |  |  |  | $ 2.7 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |  |  |  |
Equity Instruments Other than Options, Nonvested, Number, Beginning Balance |  |  |  | 81,118 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted |  |  |  | 0 |  |  | 87,308
Equity Instruments Other than Options, Vested in Period |  |  |  | (79,002) |  |  |
Equity Instruments Other than Options, Forfeited in Period |  |  |  | (2,116) |  |  |
Equity Instruments Other than Options, Nonvested, Number, Ending Balance |  |  |  | 0 |  | 81,118 |
Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value |  |  |  | $ 0 |  | $ 31.03 |
Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value |  |  |  | 0 |  | $ 31.03 |
Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value |  |  |  | 31.03 |  |  |
Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value |  |  |  | $ 31.03 |  |  |
Fair Value of Vested Performance Units and Restricted Stock |  |  |  | $ 2.5 |  | $ 5.2 | $ 4.9
Performance Units Related to Earnings Per Share [Member] | Og and E [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted |  |  |  | 0 |  |  | 30,649
Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value |  |  |  | $ 0 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number |  |  |  | 25,235 |  | 53,977 |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted |  |  |  | 0 |  |  | 30,649
Equity Instruments Other than Options, Converted in Period | [1] |  |  | (25,931) |  |  |
Equity Instruments Other than Options, Forfeited in Period |  |  |  | (1,969) |  |  |
Equity Other Than Options, Employee Migration | [2] |  |  | (842) |  |  |
Awards Other than Options, Fully Vested |  |  |  | 25,235 |  |  |
Equity Other Than Options, Employee Migration, Weighted Average Grant Date Fair Value |  |  |  | $ 31.03 |  |  |
Equity Instruments Other than Options, Converted, Aggregrate Intrinsic Value |  |  |  | $ 2.3 |  |  |
Equity Instruments Other than Options, Vested in Period, Aggregate Intrinsic Value |  |  |  | (0.8) |  |  |
Equity Instruments Other than Options, Outstanding, Aggregrate Intrinsic Value |  |  |  | $ 0.8 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |  |  |  |
Equity Instruments Other than Options, Nonvested, Number, Beginning Balance |  |  |  | 28,046 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted |  |  |  | 0 |  |  | 30,649
Equity Instruments Other than Options, Vested in Period |  |  |  | (25,235) |  |  |
Equity Instruments Other than Options, Forfeited in Period |  |  |  | (1,969) |  |  |
Equity Other Than Options, Employee Migration | [2] |  |  | (842) |  |  |
Equity Instruments Other than Options, Nonvested, Number, Ending Balance |  |  |  | 0 |  | 28,046 |
Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value |  |  |  | $ 0 |  | $ 31.03 |
Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value |  |  |  | 0 |  |  |
Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value |  |  |  | 31.03 |  |  |
Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value |  |  |  | $ 31.03 |  |  |
Fair Value of Vested Performance Units and Restricted Stock |  |  |  | $ 0.8 |  | $ 0.9 | $ 1.7
Total Shareholder Return [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted |  |  |  | 201,552 | [3] | 208,647 | 261,916
Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value |  |  |  | $ 38.03 |  | $ 47.00 | $ 36.86
Expected Dividend Rate |  |  |  | 3.50% |  | 4.00% | 3.60%
Expected Volatility Rate |  |  |  | 15.00% |  | 17.00% | 19.00%
Risk Free Interest Rate |  |  |  | 1.17% |  | 2.47% | 2.38%
Expected Term |  |  |  | 2 years 10 months 6 days |  | 2 years 10 months 9 days | 2 years 10 months 9 days
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number |  |  |  | 612,262 |  | 664,817 |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted |  |  |  | 201,552 | [3] | 208,647 | 261,916
Equity Instruments Other than Options, Converted in Period | [1] |  |  | (222,163) |  |  |
Equity Instruments Other than Options, Forfeited in Period |  |  |  | (31,944) |  |  |
Awards Other than Options, Fully Vested |  |  |  | 236,990 |  |  |
Equity Instruments Other than Options, Converted, Aggregrate Intrinsic Value |  |  |  | $ 11.5 |  |  |
Equity Instruments Other than Options, Vested in Period, Aggregate Intrinsic Value |  |  |  | (5.4) |  |  |
Equity Instruments Other than Options, Outstanding, Aggregrate Intrinsic Value |  |  |  | $ 5.4 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |  |  |  |
Equity Instruments Other than Options, Nonvested, Number, Beginning Balance |  |  |  | 442,654 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted |  |  |  | 201,552 | [3] | 208,647 | 261,916
Equity Instruments Other than Options, Vested in Period |  |  |  | (236,990) |  |  |
Equity Instruments Other than Options, Forfeited in Period |  |  |  | (31,944) |  |  |
Equity Instruments Other than Options, Nonvested, Number, Ending Balance |  |  |  | 375,272 |  | 442,654 |
Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value |  |  |  | $ 42.51 |  | $ 41.43 |
Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value |  |  |  | 38.03 |  | $ 47.00 | $ 36.86
Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value |  |  |  | 36.86 |  |  |
Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value |  |  |  | $ 41.15 |  |  |
Fair Value of Vested Performance Units and Restricted Stock |  |  |  | $ 8.7 |  | $ 9.3 | $ 5.9
Total Compensation Cost Not yet Recognized |  |  |  | $ 7.1 |  |  |
Total Compensation Cost Not yet Recognized, Period for Recognition |  |  |  | 1 year 7 months 13 days |  |  |
Total Shareholder Return [Member] | Og and E [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted |  |  |  | 67,975 | [4] | 68,396 | 91,940
Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value |  |  |  | $ 38.03 |  | $ 47.00 | $ 36.86
Expected Dividend Rate |  |  |  | 3.50% |  | 4.00% | 3.60%
Expected Volatility Rate |  |  |  | 15.00% |  | 17.00% | 19.00%
Risk Free Interest Rate |  |  |  | 1.17% |  | 2.47% | 2.38%
Expected Term |  |  |  | 2 years 10 months 6 days |  | 2 years 10 months 9 days | 2 years 10 months 9 days
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number |  |  |  | 182,363 |  | 227,679 |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted |  |  |  | 67,975 | [4] | 68,396 | 91,940
Equity Instruments Other than Options, Converted in Period | [1] |  |  | (77,799) |  |  |
Equity Instruments Other than Options, Forfeited in Period |  |  |  | (28,985) |  |  |
Equity Other Than Options, Employee Migration | [5] |  |  | (6,507) |  |  |
Awards Other than Options, Fully Vested |  |  |  | 75,693 |  |  |
Equity Other Than Options, Employee Migration, Weighted Average Grant Date Fair Value |  |  |  | $ 40.26 |  |  |
Equity Instruments Other than Options, Converted, Aggregrate Intrinsic Value |  |  |  | $ 4.0 |  |  |
Equity Instruments Other than Options, Vested in Period, Aggregate Intrinsic Value |  |  |  | (1.7) |  |  |
Equity Instruments Other than Options, Outstanding, Aggregrate Intrinsic Value |  |  |  | $ 1.7 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |  |  |  |
Equity Instruments Other than Options, Nonvested, Number, Beginning Balance |  |  |  | 149,880 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted |  |  |  | 67,975 | [4] | 68,396 | 91,940
Equity Instruments Other than Options, Vested in Period |  |  |  | (75,693) |  |  |
Equity Instruments Other than Options, Forfeited in Period |  |  |  | (28,985) |  |  |
Equity Other Than Options, Employee Migration | [5] |  |  | (6,507) |  |  |
Equity Instruments Other than Options, Nonvested, Number, Ending Balance |  |  |  | 106,670 |  | 149,880 |
Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value |  |  |  | $ 42.49 |  | $ 41.31 |
Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value |  |  |  | 38.03 |  | $ 47.00 | $ 36.86
Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value |  |  |  | 36.86 |  |  |
Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value |  |  |  | $ 41.12 |  |  |
Fair Value of Vested Performance Units and Restricted Stock |  |  |  | $ 2.8 |  | $ 3.2 | $ 2.1
Total Compensation Cost Not yet Recognized |  |  |  | $ 1.8 |  |  |
Total Compensation Cost Not yet Recognized, Period for Recognition |  |  |  | 1 year 7 months 20 days |  |  |
Performance Shares [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Compensation Expense |  |  |  | $ 8.9 |  | 13.0 | 13.3
Performance Shares [Member] | Og and E [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Compensation Expense |  |  |  | 2.6 |  | 4.5 | 4.6
Restricted Stock [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Compensation Expense |  |  |  | $ 0.9 |  | $ 0.9 | $ 0.1
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted |  |  |  | 67,193 |  | 75,929 | 826
Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value |  |  |  | $ 43.69 |  | $ 41.71 | $ 36.28
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number |  |  |  | 124,919 |  | 72,880 |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted |  |  |  | 67,193 |  | 75,929 | 826
Equity Instruments Other than Options, Forfeited in Period |  |  |  | (12,546) |  |  |
Awards Other than Options, Fully Vested |  |  |  | 1,752 |  |  |
Equity Instruments Other than Options, Vested in Period, Aggregate Intrinsic Value |  |  |  | $ (0.1) |  |  |
Equity Instruments Other than Options, Outstanding, Aggregrate Intrinsic Value |  |  |  | $ 4.0 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |  |  |  |
Equity Instruments Other than Options, Nonvested, Number, Beginning Balance |  |  |  | 72,880 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted |  |  |  | 67,193 |  | 75,929 | 826
Equity Instruments Other than Options, Vested in Period |  |  |  | (2,608) |  |  |
Equity Instruments Other than Options, Forfeited in Period |  |  |  | (12,546) |  |  |
Equity Instruments Other than Options, Nonvested, Number, Ending Balance |  |  |  | 124,919 |  | 72,880 |
Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value |  |  |  | $ 42.69 |  | $ 41.66 |
Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value |  |  |  | 43.69 |  | $ 41.71 | $ 36.28
Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value |  |  |  | 40.30 |  |  |
Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value |  |  |  | $ 42.60 |  |  |
Fair Value of Vested Performance Units and Restricted Stock |  |  |  | $ 0.1 |  | $ 0.1 | $ 0.1
Total Compensation Cost Not yet Recognized |  |  |  | $ 1.6 |  |  |
Total Compensation Cost Not yet Recognized, Period for Recognition |  |  |  | 1 year 7 months 24 days |  |  |
Restricted Stock [Member] | Og and E [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Compensation Expense |  |  |  | $ 0.4 |  | $ 0.4 | $ 0.0
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted |  |  |  | 22,665 |  | 26,141 | 0
Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value |  |  |  | $ 43.69 |  | $ 41.63 | $ 0
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number |  |  |  | 34,130 |  | 25,005 |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted |  |  |  | 22,665 |  | 26,141 | 0
Equity Instruments Other than Options, Forfeited in Period |  |  |  | (11,100) |  |  |
Equity Other Than Options, Employee Migration | [2] |  |  | (1,327) |  |  |
Awards Other than Options, Fully Vested |  |  |  | 1,114 |  |  |
Equity Other Than Options, Employee Migration, Weighted Average Grant Date Fair Value |  |  |  | $ 42.76 |  |  |
Equity Instruments Other than Options, Vested in Period, Aggregate Intrinsic Value |  |  |  | $ 0.0 |  |  |
Equity Instruments Other than Options, Outstanding, Aggregrate Intrinsic Value |  |  |  | $ 1.1 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |  |  |  |
Equity Instruments Other than Options, Nonvested, Number, Beginning Balance |  |  |  | 25,005 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted |  |  |  | 22,665 |  | 26,141 | 0
Equity Instruments Other than Options, Vested in Period |  |  |  | (1,113) |  |  |
Equity Instruments Other than Options, Forfeited in Period |  |  |  | (11,100) |  |  |
Equity Other Than Options, Employee Migration | [2] |  |  | (1,327) |  |  |
Equity Instruments Other than Options, Nonvested, Number, Ending Balance |  |  |  | 34,130 |  | 25,005 |
Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value |  |  |  | $ 42.67 |  | $ 41.62 |
Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value |  |  |  | 43.69 |  | $ 41.63 | $ 0
Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value |  |  |  | 40.59 |  |  |
Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value |  |  |  | $ 42.60 |  |  |
Fair Value of Vested Performance Units and Restricted Stock |  |  |  | $ 0.1 |  | $ 0.0 | $ 0.0
Total Compensation Cost Not yet Recognized |  |  |  | $ 0.4 |  |  |
Total Compensation Cost Not yet Recognized, Period for Recognition |  |  |  | 1 year 8 months 4 days |  |  |
Stock Compensation Plan [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Compensation Expense |  |  |  | $ 9.8 |  | 13.9 | 13.4
Stock Compensation Plan [Member] | Og and E [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Compensation Expense |  |  |  | 3.0 |  | 4.9 | 4.6
Performance Units Related to Earnings Per Share [Member] | Performance Shares [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Compensation Expense |  |  |  | 1.0 |  | 4.3 | 5.1
Performance Units Related to Earnings Per Share [Member] | Performance Shares [Member] | Og and E [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Compensation Expense |  |  |  | 0.3 |  | 1.5 | 1.8
Total Shareholder Return [Member] | Performance Shares [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Compensation Expense |  |  |  | 7.9 |  | 8.7 | 8.2
Total Shareholder Return [Member] | Performance Shares [Member] | Og and E [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Compensation Expense |  |  |  | $ 2.3 |  | $ 3.0 | $ 2.8
[1] | These amounts represent performance units that vested at December 31, 2019 which were settled in March 2020.
[2] | Due to certain employees transferring between OG&E and OGE Energy.
[3] | For performance units, this represents the target number of performance units granted. Actual number of performance units earned, if any, is dependent upon performance and may range from zero percent to 200 percent of the target.
[4] | For performance units, this represents the target number of performance units granted. Actual number of performance units earned, if any, is dependent upon performance and may range from zero percent to 200 percent of the target.
[5] | Due to certain employees transferring between OG&E and OGE Energy.

X
- Definition Awards Other than Options, Fully Vested + References No definition available. + Details
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- Definition Equity Instruments Other than Options, Converted, Aggregrate Intrinsic Value + References No definition available. + Details
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- Definition Equity Instruments Other than Options, Converted in Period + References No definition available. + Details
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- Definition Equity Other Than Options, Employee Migration + References No definition available. + Details
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- Definition Equity Other Than Options, Employee Migration, Weighted Average Grant Date Fair Value + References No definition available. + Details
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- Definition Minimum payout range + References No definition available. + Details
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