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Stock-Based Compensation Plans and Employee Benefits (Restricted Stock Unit Activity) (Details) - Restricted stock units - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Number of Shares
Non-vested at beginning of period (in shares)	598
Granted (in shares)	181
Vested (in shares)	(248)
Non-vested at end of period (in shares)	531	598
Weighted Average Grant Date Fair Value Per Share
Non-vested at beginning of period (in dollars per share)	$ 9.18
Granted (in dollars per share)	14.68	$ 8.84	$ 10.16
Vested (in dollars per share)	9.62
Non-vested at end of period (in dollars per share)	$ 10.85	$ 9.18
Non-vested, aggregate intrinsic value	$ 7,885	$ 8,688
Fair value of units vested during period	$ 3,600	$ 1,800	$ 1,400

X

- Definition

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).

+ References

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The weighted average fair value at grant date for nonvested equity-based awards issued 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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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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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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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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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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Intrinsic value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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