CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Unaudited) (USD $) In Thousands, unless otherwise specified	Common Stock [Member]	Capital in Excess of Par Value [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2014	$ 47,872	$ 91,411	$ 259,160	$ (2,652)	$ (21,638)	$ 374,153us-gaap_StockholdersEquity
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	0	0	8,948	0	0	8,948us-gaap_NetIncomeLoss
Other comprehensive income (loss), net of tax	0	0	0	(2,718)	0	(2,718)
Cash dividends paid	0	0	(3,434)	0	0	(3,434)us-gaap_DividendsCommonStockCash
Stock-based compensation and related tax benefits	0	698	0	0	630	1,328
Stock options exercised and related tax benefits	0	(1)	0	0	65	64
Employee Stock Ownership Plan	0	1,001	0	0	1,207	2,208us-gaap_AmortizationOfESOPAward
Balance at Mar. 31, 2015	$ 47,872	$ 93,109	$ 264,674	$ (5,370)	$ (19,736)	$ 380,549us-gaap_StockholdersEquity

This element represents the amount of recognized equity-based compensation during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized). Alternate captions include the words "stock-based compensation".

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Value of shares committed to be released under an Employee Stock Ownership Plan (ESOP).

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Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount after tax of other comprehensive income (loss) attributable to parent entity.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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Value of stock issued as a result of the exercise of stock options, after deduction of related income tax (expense) benefit.

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No definition available.

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