Maximum Aggregate Value of Performance Unit Award Outstanding

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Intrinsic Value

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No definition available.

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- Definition

Unrestricted Stock Granted to Employees

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- Definition

Unrecognized cost of unvested share-based compensation awards.

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- Definition

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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- Definition

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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- 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

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.

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No definition available.

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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- Definition

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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- Definition

Number of share instruments newly issued under a share-based compensation plan.

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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Value of stock (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of stock value of such awards forfeited. Stock issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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Stock-Based Compensation (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Mar. 31, 2018	Sep. 30, 2018	Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock-based compensation expense related to unvested awards, amount		$ 2,700
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition		1 year 11 months
Maximum Aggregate Value of Performance Unit Award Outstanding		$ 1,300
Unrestricted Stock Granted to Employees	11,112
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares authorized under the 2006 Equity Plan		500,000
SARs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period		3 years
Awards expiration period		10 years
Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total intrinsic value of awards released in period		$ 3,200	$ 900
Restricted Shares \| Employees \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards expiration period		1 year
Restricted Shares \| Employees \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards expiration period		3 years
2006 Equity Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized under 2006 Equity Plan		891,340
Time-Based Vesting \| Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awarded		18,729
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period		18,729
Performance-Based Vesting \| Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awarded		84,876
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period		84,876
Director [Member] \| Time-Based Vesting \| Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period	3,600
Treasury Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures	$ 388
Treasury Stock \| Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures	$ 128