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v3.22.1

Stock-based Compensation Plans (Narrative) (Details) $ / shares in Units, $ in Millions |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Nov. 30, 2021 | Mar. 31, 2022 USD ($) $ / shares shares | Dec. 31, 2021 $ / shares shares | Mar. 31, 2021 shares | Mar. 31, 2022 USD ($) $ / shares shares
Share-based Payment Arrangement, Expense | $ |  | $ 2.5 |  |  |
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount | $ |  | $ 13.3 |  |  | $ 13.3
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount |  | 944,631 |  | 664,082 |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate | 1.70% |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate | 0.76% |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term | 2 years 9 months 29 days |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate | 1.70% |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate | 0.76% |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term | 2 years 9 months 29 days |  |  |  |
Phantom Share Units (PSUs) [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instrument Other than Option, Nonvested, Intrinsic Value | $ / shares |  | $ 12.92 |  |  | $ 12.92
Share-based compensation liability | $ |  | $ 2.1 |  |  | $ 2.1
Granted, shares |  |  | 199,549 |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares |  |  | $ 13.64 |  |
Granted, shares |  |  | 199,549 |  |
Performance Shares [Member] |  |  |  |  |
Share-based compensation, units awarded but not yet granted |  | 58,139 |  |  | 58,139
Restricted Stock Units (RSUs) [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period |  | 104,380 |  |  |
Granted, shares |  | 88,250 | 135,129 |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares |  | $ 13.03 | $ 13.64 |  |
Granted, shares |  | 88,250 | 135,129 |  |
Market Based Performance Shares |  |  |  |  |
Granted, shares |  |  | 230,089 |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares |  |  | $ 15.76 |  |
Granted, shares |  |  | 230,089 |  |
Equity Option |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate | 1.62% |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate | 1.33% |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term | 6 years |  |  |  |
Granted, shares |  |  | 457,482 |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate | 1.62% |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares |  |  | $ 3.43 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate | 1.33% |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term | 6 years |  |  |  |
Granted, shares |  |  | 457,482 |  |
Minimum [Member] | Performance Shares [Member] |  |  |  |  |
Performance Factors |  |  |  |  | 0
Minimum [Member] | Market Based Performance Shares |  |  |  |  |
Performance Factors |  |  |  |  | 0
Maximum [Member] | Performance Shares [Member] |  |  |  |  |
Performance Factors |  |  |  |  | 2
Maximum [Member] | Market Based Performance Shares |  |  |  |  |
Performance Factors |  |  |  |  | 2
Share-based Payment Arrangement, Tranche Two [Member] | Performance Shares [Member] |  |  |  |  |
Granted, shares |  |  | 57,627 |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares |  |  | $ 13.81 |  |
Granted, shares |  |  | 57,627 |  |

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