Stock Based Compensation Schedule of Other Stock Option Plan Information (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Granted, in shares	75,518	10,404	78,848
Fair Value of Options Granted, Weighted Average Grant Date, in dollars per share	$ 5.92	$ 5.35	$ 5.77
Dividend Yield	3.97%	4.20%	3.93%
Expected Volatility	35.30%	36.57%	37.43%
Risk Free Interest Rate	2.19%	1.31%	1.22%
Expected Life, in years	6 years 10 months 6 days	6 years 8 months 15 days	6 years 5 months 16 days
Stock-Based Compensation Expense	$ 360us-gaap_ShareBasedCompensation	$ 372us-gaap_ShareBasedCompensation	$ 424us-gaap_ShareBasedCompensation
Compensation Costs for Non-vested Awards Not Yet Recognized	478	420	737
Weighted Average Expected Vesting Period, In Years	1 year 8 months 5 days	1 year 5 months 13 days	1 year 8 months 15 days
Proceeds From Stock Options Exercised	1,454	1,254	2,105
Tax Benefit for Disposition of Stock Options	25	23	68
Intrinsic Value of Stock Options Exercised	$ 170	$ 267	$ 2,434

Aggregate proceeds received by the entity during the annual period from exercises of stock or unit options and conversion of similar instruments granted under equity-based payment arrangements.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

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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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Unrecognized cost of unvested options awarded to employees as compensation.

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Disclosure of the aggregate tax benefit realized from the exercise of stock options and the conversion of similar instruments during the annual period.

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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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

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

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