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Share-Based Compensation (Narrative) (Details) - shares			3 Months Ended	6 Months Ended
	Jul. 20, 2021	Jun. 15, 2018	Mar. 31, 2021	Jun. 30, 2021	Dec. 31, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares granted under Stock incentive plan			119,000
Maximum shares to be earned				113,636
Share based compensation average annual total stock holders return, description				The percentage of the market performance-based equity award to be earned will be determined based on the Company’s annual return on an investment in the Company’s common stock (“TSR”) over the Interim Performance Period and/or over the Full Performance Period as follows: if average annual TSR (1) is below 4%, the percentage of grant earned would be 0%, (2) equals 4%, the percentage of grant earned would be 33.3%, (3) equals 6.5%, the percentage of grant earned would be 66.7%, and (4) equals 10% or above, the percentage of grant earned would be 100%.
Common stock, shares issued				13,628,000	13,530,000
Chief Executive Officer [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares granted to Company's President		113,636
Chief Executive Officer [Member] | Subsequent Event [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock, shares issued	113,636
Dividend equivalents rights paid	300,000
Chief Executive Officer [Member] | Market Performance-Based Equity Award [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares granted under Stock incentive plan		227,272
Dividend equivalent rights		227,272

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Share based compensation arrangement by share based payment award equity instruments other than options maximum shares to be earned.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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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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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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