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Share-Based Compensation (Narrative) (Details) $ / shares in Units, $ in Millions				12 Months Ended
	May 17, 2018 USD ($) shares	Mar. 21, 2018 USD ($) shares	Feb. 16, 2018 USD ($) people shares	Dec. 31, 2018 USD ($) shares	Dec. 31, 2017 USD ($) shares	Dec. 31, 2016 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)				1,000,000
Number of shares available for grant (in shares)				413,234
Number of options, granted				0	0	0
Number of options, outstanding						18,000
Weighted average exercise price, outstanding (in dollars per share) | $ / shares						$ 18.92
Number of options, exercised					0
Increase (decrease) to share based compensation expense | $					$ 0.4	$ (1.4)
Deferred tax benefit | $				$ 0.0	$ 0.1	$ 0.0
Unrecognized share-based compensation expense | $				$ 1.7
Unrecognized share-based compensation expense recognition period				1 year 7 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%
Number of RSUs, granted	9,294	13,215	52,166	74,000	98,000	129,000
Grant date fair value | $	$ 0.3	$ 0.4	$ 1.3
Share-based compensation arrangement, other than options, vesting conditions (in dollars per share)		Twenty-five percent of these awards will vest on January 1, 2021	Twenty-five percent of these awards will vest on January 1, 2021
Fair value of RSU's vested | $				$ 2.7
Award vesting period		3 years	3 years

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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 difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Net number of share options (or share units) granted during the period.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option 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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