No definition available.

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- Definition

Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding.

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- Definition

Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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- Definition

Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

+ References

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- Definition

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

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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- 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).

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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).

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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.

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- Definition

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

+ References

No definition available.

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

+ References

No definition available.

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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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- Definition

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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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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Number of shares authorized for issuance under share-based payment arrangement.

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- Definition

Amount of cost expensed and capitalized for award under share-based payment arrangement.

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Stock-Based Compensation Plan (Details) - The 2018 LTIP - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	May 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)	79,228			150,000
Compensation expense	$ 134,000	$ 123,000
Accrued dividends	$ 28,800		$ 23,600
Restricted stock unit awards
Number of Shares
Unit awards, beginning balance (in shares)	18,782
Granted (in shares)	20,346
Vested (in shares)	(217)
Forfeited (in shares)	(282)
Unit awards, ending balance (in shares)	38,629
Weighted Average Grant Date Fair Value per Share
Unit awards, beginning balance (in dollars per share)	$ 37.05
Granted (in dollars per share)	24.85
Vested (in dollars per share)	37.61
Forfeited (in dollars per share)	37.61
Unit awards, ending balance (in dollars per share)	$ 30.62
Aggregate grant date fair value awards issues	$ 500,000
Unrecognized compensation cost	$ 700,000
Period for recognition for remaining compensation cost	1 year 8 months 12 days
Restricted stock unit awards \| Minimum
Weighted Average Grant Date Fair Value per Share
Granted (in dollars per share)	$ 24.77
Restricted stock unit awards \| Maximum
Weighted Average Grant Date Fair Value per Share
Granted (in dollars per share)	$ 26.23
Performance Unit Awards
Number of Shares
Unit awards, beginning balance (in shares)	2,787
Granted (in shares)	10,781
Vested (in shares)	0
Forfeited (in shares)	(27)
Unit awards, ending balance (in shares)	13,541
Weighted Average Grant Date Fair Value per Share
Unit awards, beginning balance (in dollars per share)	$ 43.00
Granted (in dollars per share)	24.92
Vested (in dollars per share)	0
Forfeited (in dollars per share)	43.00
Unit awards, ending balance (in dollars per share)	$ 28.60
Aggregate grant date fair value awards issues	$ 200,000
Performance factor	100000.00%
Unrecognized compensation cost	$ 300,000
Period for recognition for remaining compensation cost	2 years 8 months 12 days
Performance Unit Awards \| Minimum
Weighted Average Grant Date Fair Value per Share
Granted (in dollars per share)	$ 24.77
Performance Unit Awards \| Maximum
Weighted Average Grant Date Fair Value per Share
Granted (in dollars per share)	$ 26.23