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Stock-Based Compensation Plans and Employee Benefits (Directors' Awards) (Details) - Directors $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($) $ / shares shares
Award Date One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted (in shares)	79,138
Grant date fair value (in dollars per share) | $ / shares	$ 9.75
Award Date Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted (in shares)	10,710
Grant date fair value (in dollars per share) | $ / shares	$ 11.52
CSE
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted (in shares)	3,096
Grant date fair value (in dollars per share) | $ / shares	$ 12.20
CSE and Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-vested, outstanding (in shares)	179,522
Non-vested, aggregate intrinsic value | $	$ 2.7

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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- Definition

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).

+ References

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- Definition

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.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)-(ii)
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Intrinsic value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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