Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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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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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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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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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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Percentage of performance based units on total units approved.

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Vesting conditions of share based compensation other than options.

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Share-Based Compensation (Narrative) (Details) $ in Thousands				12 Months Ended
	May 16, 2019 USD ($) shares	Mar. 20, 2019 USD ($) shares	Mar. 13, 2019 USD ($) people shares	Dec. 31, 2019 USD ($) shares	Dec. 31, 2018 USD ($) shares	Dec. 31, 2017 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares) \| shares				1,000,000
Number of shares available for grant (in shares) \| shares				417,602
Deferred tax benefit				$ 100	$ 0	$ 100
Unrecognized share-based compensation expense				$ 1,200
Unrecognized share-based compensation expense recognition period				1 year 5 months 12 days
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of people granted awards \| people			3
Percentage of performance based units on total units approved		75.00%	75.00%
Grant date fair value	$ 300	$ 400	$ 1,800
Number of RSUs, granted (in shares) \| shares	8,244	12,445	51,814	73,000	74,000	98,000
Share-based compensation arrangement, other than options, vesting conditions (in dollars per share)		Twenty-five percent of these awards will vest on January 1, 2022	Twenty-five percent of these awards will vest on January 1, 2022
Award vesting period		3 years	3 years
Fair value of RSU's vested				$ 2,500
Increase (decrease) to share based compensation expense				1,336	$ 1,799	$ 1,499
Scenario, Adjustment
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increase (decrease) to share based compensation expense				$ (800)		$ 400