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Stock-based Payments and Director Fees - Grants of Restricted Stock Units to Directors and Employees (Details) - Restricted stock - Long Term Incentive Plan - $ / shares	3 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019
Employee And Service Provider
Shares
Shares, nonvested (in shares)	163,083	163,083	114,334	114,334	163,083	114,334
Shares vested (in shares)	0	0	0	0
Shares forfeited (in shares)	0	0	0	0
Shares granted (in shares)	0	0	0	0
Weighted Average Grant Date Fair Value
Per share grant fair value (in dollars per share)	$ 11.07	$ 11.07	$ 13.83	$ 13.83	$ 11.07	$ 13.83
Shares vested (in dollars per share)	0	0	0	0
Shares forfeited (in dollars per share)	0	0	0	0
Shares granted (in dollars per share)	$ 0	$ 0	$ 0	$ 0
Director
Shares
Shares, nonvested (in shares)	8,000	0	0	0	0	0
Shares vested (in shares)	(8,000)	(2,000)	0	0
Shares forfeited (in shares)	0	0	0	0
Shares granted (in shares)	16,000	2,000	0	0
Weighted Average Grant Date Fair Value
Per share grant fair value (in dollars per share)	$ 12.60	$ 0	$ 0	$ 0	$ 0	$ 0
Shares vested (in dollars per share)	12.60	12.00	0	0
Shares forfeited (in dollars per share)	0	0	0	0
Shares granted (in dollars per share)	$ 12.60	$ 12.00	$ 0	$ 0

X

- Definition

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

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-SubTopic 10
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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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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 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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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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