General descriptive information regarding an arrangement under which employees and directors receive: (a) awards of equity shares, equity share options, or other equity instruments; or (b) the entity incurs liabilities to them: (1) in amounts based, at least in part, on the price of the entity's shares or other equity instruments; or (2) that require or may require settlement by issuance of the entity's shares. Such an arrangement is usually provided to employees and directors to compensate them, provide performance incentives to them, and to attract or retain their services. May also include pertinent information particular to a plan that is not elsewhere specified in the taxonomy.

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-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 64, 65

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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 of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) 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 or units.

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The intrinsic value of equity-based payment equity instruments, excluding stock (or unit) options, that vested during the reporting period as calculated by applying the disclosed pricing methodology.

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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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The total accumulated difference between fair values of underlying shares on dates of exercise and exercise price on options which were exercised (or share units converted) into shares during the reporting period under the plan.

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Number of share instruments newly issued under a share-based compensation plan.

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

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-Name Accounting Standards Codification

-Topic 820

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Number of share options (or share units) exercised during the current period.

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-Name Regulation S-X (SX)

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Note 12 - Equity Plans: (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended	12 Months Ended			12 Months Ended	6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011	Jan. 03, 2012	Mar. 01, 2011	Jan. 02, 2012 Purchase Requirement [Member]	Jun. 30, 2012 Matching Purchase Requirement [Member]	Jun. 30, 2012 Match [Member]	Jun. 30, 2012 Shares Matched for Quarter [Member]	Jun. 30, 2012 Five Year Anniversary [Member]	Jun. 30, 2012 Ten Year Anniversary [Member]	Jun. 30, 2012 Fifteen Year Anniversary [Member]	Jun. 30, 2012 Twenty Year Anniversary [Member]	Jun. 30, 2012 Twenty Five Year Anniversary [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in Shares)	2,170
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value (in Dollars)	$ 52
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares)	500,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares)			1,800	1,800
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 26.48	$ 27.16	$ 25.55	$ 26.91
Share-based Compensation Arrangement by Share-based Payment Award, Description					750	500	250	6,750
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Intrinsic Value									$ 25	$ 50	$ 75	$ 100	$ 100
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares)	40,368	81,475
Share Price		$ 23.32
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period (in Shares)	(375)