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Stock-based Compensation (Details) - USD ($) |  | 3 Months Ended | 135 Months Ended
--- | --- | --- | ---
Jan. 31, 2019 | Mar. 31, 2020 | Mar. 31, 2019 | Mar. 31, 2020
Allocated Share-based Compensation Expense, Total |  | $ 2,500,000 | $ 4,000,000.0 |
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense |  | $ 600,000 | $ 1,000,000.0 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross |  |  |  | 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance |  | 0 |  | 0
Omnibus Plan 2014 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 3 years |  |  |
The 2019 Long-term Incentive Compensation Program [Member] |  |  |  |
PRSU Awards, Percentage of Target Award, Below Threshold-level Performance | 0.00% |  |  |
PRSU Awards, Percentage of Target Award, Threshold-level Performance | 50.00% |  |  |
PRSU Awards, Percentage of Target Award, Target-Level Performance | 100.00% |  |  |
PRSU Awards, Percentage of Target Award, Maximum-Level Performance | 150.00% |  |  |
Restricted Stock Units (RSUs) [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period |  | 170,228 | 263,574 |
Restricted Stock Units (RSUs) [Member] | Omnibus Plan 2014 [Member] |  |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total |  | $ 8,400,000 |  | $ 8,400,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition |  | 2 years 8 months 12 days |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value |  | $ 5,000,000.0 | $ 6,100,000 |
Performance-based Restricted Stock Units [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period |  | 72,143 | 57,870 |
Phantom Share Units (PSUs) [Member] | Phantom Stock Plan [Member] |  |  |  |
Allocated Share-based Compensation Expense, Total |  | $ (900,000) | $ 100,000 |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value |  | $ 1,000 | $ 22,000 |

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- Definition Represents the number of performance-based restricted stock units that may be earned, expressed as a percentage of the target award, for maximum-level performance. + References No definition available. + Details
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- Definition Represents the number of performance-based restricted stock units that may be earned, expressed as a percentage of the target award, for target-level performance. + References No definition available. + Details
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- Definition Represents the number of performance-based restricted stock units that may be earned, expressed as a percentage of the target award, for threshold-level performance. + References No definition available. + Details
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