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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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- Definition

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

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-Publisher FASB
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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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-Publisher FASB
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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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Share-Based Compensation - Plan Provisions (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Share-Based Compensation
Compensation expense	$ 69	$ 28	$ 135	$ 37
Income tax benefit	$ 19	$ 11	$ 37	$ 15
2010 Equity Incentive Plan
Share-Based Compensation
Number of shares authorized	1,862,637		1,862,637
2010 Equity Incentive Plan \| Vesting period one
Share-Based Compensation
Unrecognized compensation costs, period of recognition			3 years
Vesting period			3 years
2010 Equity Incentive Plan \| Vesting period two
Share-Based Compensation
Unrecognized compensation costs, period of recognition			5 years
Vesting period			5 years
2010 Equity Incentive Plan \| Vesting period three
Share-Based Compensation
Unrecognized compensation costs, period of recognition			6 years
Vesting period			6 years