Incentive Plans (Share Based Incentive Award Activity) (Details)	9 Months Ended
Sep. 30, 2020 shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Beginning balance outstanding, shares	121,953
Awards granted, shares	0
Awards forfeited, shares	0
Awards exercised, shares	0
Awards exercised, shares	(7,728)
Ending balance outstanding, shares	114,225
Restricted Stock Equity Awards
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Beginning balance outstanding, shares	824,193
Awards granted, shares	383,771
Awards forfeited, shares	(12,438)
Awards vested, shares	(319,203)
Awards exercised, shares	0
Ending balance outstanding, shares	876,323
Restricted Stock Liability Awards
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Beginning balance outstanding, shares	246,851
Awards granted, shares	135,176
Awards forfeited, shares	(5,257)
Awards vested, shares	(102,588)
Awards exercised, shares	0
Ending balance outstanding, shares	274,182
Performance Units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Beginning balance outstanding, shares	116,215
Awards granted, shares	132,621
Awards forfeited, shares	0
Awards vested, shares	(4,735)
Awards exercised, shares	0
Ending balance outstanding, shares	244,101

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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Number of non-option equity instruments exercised by participants.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Gross number of share options (or share units) granted during the period.

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No definition available.

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Number of non-vested options outstanding.

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Number of options vested.

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Number of share options (or share units) exercised during the current period.

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