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Shareholders' Equity (Details) - Employee Stock Option [Member] $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) $ / shares shares
Number of options
Options outstanding, beginning balance | shares	679,552
Granted | shares
Exercised | shares	(215,542)
Expired and forfeited | shares	(48,500)
Options outstanding, ending balance | shares	415,510
Vested and expected to vest | shares	415,510
Exercisable as of December 31, 2018 | shares	159,058
Weighted average exercise price
Options outstanding, beginning balance | $ / shares	$ 13.20
Granted | $ / shares
Exercised | $ / shares	9.87
Expired and forfeited | $ / shares	15.76
Options outstanding, ending balance | $ / shares	14.62
Vested and expected to vest | $ / shares	14.62
Exercisable at December 31, 2018 | $ / shares	$ 11.81
Weighted average remaining contractual term (in years)
Outstanding, beginning balance	3 years 4 months 6 days
Outstanding, ending balance	2 years 8 months 9 days
Vested and expected to vest	2 years 8 months 9 days
Exercisable at December 31, 2018	2 years 7 days
Aggregate intrinsic value
Outstanding, beginning balance | $	$ 4,517
Outstanding, ending balance | $	3
Vested and expected to vest | $	3
Exercisable at December 31, 2018 | $	$ 3

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Sharebased Compensation Arrangement By Sharebased Payment Award Aggregate Intrinsic Value [Abstract]

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Weighted average remaining contractual term for option awards outstanding, 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 shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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

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Number of options outstanding, including both vested and non-vested options.

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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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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest options outstanding. 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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Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. 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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Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest options outstanding. 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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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Intrinsic value of equity-based compensation awards outstanding. Excludes stock and unit options.

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