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Other than shares newly issued, the number of additional shares earned but not yet issued related to performance.

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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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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.

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Unrecognized cost of unvested share-based compensation awards.

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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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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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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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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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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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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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Purchase price of common stock expressed as a percentage of its fair value.

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Price of a single share of a number of saleable stocks of a company.

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Note 12 - Stock-Based Compensation (Details) (USD $)	3 Months Ended	12 Months Ended			1 Months Ended			3 Months Ended			12 Months Ended
Note 12 - Stock-Based Compensation (Details) (USD $)	Mar. 31, 2012	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Nov. 30, 2014	May 31, 2012	Nov. 30, 2010	Dec. 31, 2014	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2011	Mar. 02, 2006
Note 12 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)	5,000	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value		$ 263,000	$ 346,000	$ 268,000
Allocated Share-based Compensation Expense		270,000	317,000	352,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Grants in Period (in Shares)			179,000	199,000
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense		106,000	123,000	139,000
Allocated Share-based Compensation Expense, Impact on Earnings Per Share (in Dollars per share)		$ (0.02)		$ 0.02
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized		541,000	518,000	749,000				541,000
Share Price (in Dollars per share)		$ 51.84us-gaap_SharePrice						51.84us-gaap_SharePrice
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)			$ 5.13	$ 5.96
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value (in Dollars per share)		$ 6.34	$ 5.92	$ 8.88
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value		1,355,000	53,000	15,000
Employee Service Share-based Compensation, Cash Received from Exercise of Stock Options		846,000	46,000	54,000
Amortization, Current Year [Member]
Note 12 - Stock-Based Compensation (Details) [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized		197,000						197,000
Amortization, Next Year [Member]
Note 12 - Stock-Based Compensation (Details) [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized		167,000						167,000
Amortization, Year 3 [Member]
Note 12 - Stock-Based Compensation (Details) [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized		109,000						109,000
Amortization Year 4 [Member]
Note 12 - Stock-Based Compensation (Details) [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized		$ 68,000						68,000
Restricted Stock [Member] \| Minimum [Member] \| 2014 Stock Option Plan [Member]
Note 12 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent		85.00%
Restricted Stock [Member]
Note 12 - Stock-Based Compensation (Details) [Line Items]
Share Based Compensation Arrangement by Share Based Payment Award, Award Vesting Period, Percentage					20.00%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares)		12,524			9,500
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)		$ 37.15			$ 42.65
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value (in Dollars per share)		$ 18.17
Nonqualified Options [Member] \| Minimum [Member] \| 2014 Stock Option Plan [Member]
Note 12 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period		5 years
Nonqualified Options [Member] \| Maximum [Member] \| 2014 Stock Option Plan [Member]
Note 12 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period		10 years
Nonqualified Options [Member] \| Key Employees [Member]
Note 12 - Stock-Based Compensation (Details) [Line Items]
Share Based Compensation Arrangement by Share Based Payment Award, Award Vesting Period, Percentage						20.00%	20.00%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)						104,000	50,000
Nonqualified Options [Member] \| Annual Grant to Non-employee Member [Member]
Note 12 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)								9,500	504
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Grants in Period (in Shares)									94,000
Nonqualified Options [Member] \| 2014 Stock Option Plan [Member]
Note 12 - Stock-Based Compensation (Details) [Line Items]
Share Based Compensation Arrangement by Share Based Payment Award, Award Vesting Period, Percentage		20.00%
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares)		0						0
Stock Award [Member] \| Director [Member] \| 2014 Stock Option Plan [Member]
Note 12 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares)		3,024
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)		$ 19.88
Stock Award [Member] \| Director [Member]
Note 12 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)										5,000
Performance Based Variable Nonqualified Stock Options [Member] \| Key Employees [Member]
Note 12 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)							64,000
Performance Based Variable Nonqualified Stock Options [Member]
Note 12 - Stock-Based Compensation (Details) [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award Performance, Awards Earned (in Shares)											4,442
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period (in Shares)				59,558
Increase in Annual Grant of Options, Number of Shares [Member]
Note 12 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Grants in Period (in Shares)									60,000
Diluted [Member]
Note 12 - Stock-Based Compensation (Details) [Line Items]
Allocated Share-based Compensation Expense, Impact on Earnings Per Share (in Dollars per share)			$ (0.02)
Basic [Member]
Note 12 - Stock-Based Compensation (Details) [Line Items]
Allocated Share-based Compensation Expense, Impact on Earnings Per Share (in Dollars per share)			$ (0.03)
Minimum [Member]
Note 12 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)				$ 5.54
Maximum [Member]
Note 12 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)				$ 6.06
2006 Stock Option Plan [Member]
Note 12 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares)												750,000
2014 Stock Option Plan [Member]
Note 12 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares)		361,000						361,000