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Share-Based Compensation (Schedule of Non-Vested Share Activity) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-vested stock options, January 1	353,348
Non-vested stock options, December 31	393,351	353,348
Weighted Average Grant Date Fair Value, Non-vested stock options, January 1	$ 3.99
Weighted Average Grant Date Fair Value Per Share, Options granted	5.76	$ 3.65	$ 4.74
Weighted Average Grant Date Fair Value, Non-vested stock options, December 31	$ 5.10	$ 3.99
2012 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted	495,000	470,000	450,000
Options vested	(441,661)
Non-vested options canceled	6,668
Weighted Average Grant Date Fair Value Per Share, Options granted	$ 5.76
Weighted Average Grant Date Fair Value Per Share, Options vested	4.98
Weighted Average Grant Date Fair Value Per Share, Options canceled	$ 3.61
2005 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted			20,000
Options vested	(6,668)
Weighted Average Grant Date Fair Value Per Share, Options vested	4.91

X

- Definition

The number of outstanding awards on stock option plans for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares.

+ References

No definition available.

+ Details

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X

- Definition

The number of outstanding awards on stock option plans for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares that are canceled, forfeitures or expired.

+ References

No definition available.

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X

- Definition

The decrease in the number of shares (or other type of equity) issuable under stock option plan pertaining to awards for which the grantee has gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units.

+ References

No definition available.

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- Definition

The weighted average fair value as of grant date pertaining to a stock option award for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with terms of the arrangement.

+ References

No definition available.

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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.

+ References

No definition available.

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X

- Definition

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

+ References

No definition available.

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)(1)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

Weighted average grant-date fair value of non-vested options forfeited.

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- Definition

Weighted average grant-date fair value of non-vested options outstanding.

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