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Share Based Compensation Plan (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share Based Compensation Plan (Textual)
Option awards vesting period	5 years
Options granted
Maximum common shares granted for incentive stock options, nonqualified stock options, stock appreciation rights ("SARs"), and restricted stock	250,000
Total intrinsic value	$ 330
Option exercised shares	42,517
Cash received from exercised options	$ 380
Restricted Stock [Member]
Share Based Compensation Plan (Textual)
Compensation cost charged against income for Long Term Incentive (LTI) Plan	$ 300	$ 130	$ 80
Option awards vesting period	4 years
Total income tax benefit recognized in income statement for share-based compensation arrangements	$ 100	40	$ 30
weighted-average period term	1 year 10 months 28 days
2008 Stock Incentive Plan [Member]
Share Based Compensation Plan (Textual)
Total unrecognized compensation cost related to non-vested share-based compensation arrangements granted under plan
Option awards vesting period	5 years
Option awards contractual terms	10 years
Maximum common shares granted for incentive stock options, nonqualified stock options, stock appreciation rights ("SARs"), and restricted stock	500,000
Restricted Stock Awards Under 2008 and 2017 Plan [Member]
Share Based Compensation Plan (Textual)
Total unrecognized compensation cost related to non-vested share-based compensation arrangements granted under plan	$ 520

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Maximum common shares granted for incentive stock options, nonqualified stock options, stock appreciation rights and restricted stock.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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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 options awarded to employees as compensation.

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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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Amount of cash inflow from exercise of stock options granted under share-based compensation arrangement.

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

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Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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