Stockholder's Equity Parenthetical (Parentheticals) (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash Dividends Paid, per Share	$ 0.99	$ 0.97	$ 0.95
Stock Dividends - Shares	334,890us-gaap_StockDividendsShares	328,323us-gaap_StockDividendsShares	321,886us-gaap_StockDividendsShares
Stock Options Exercised - Shares	61,364	58,719	96,471
Shares Issued Under Directors Stock Plan - Shares	7,584	7,643	7,226
Shares Issued Under the Employee Stock Purchase Plan - Shares	19,575	19,679	20,687
Shares Issued for Dividend Reinvestment Plans - Shares	0	49,574	74,260
Purchase of Treasury Stock - Shares	95,064us-gaap_TreasuryStockSharesAcquired	68,361us-gaap_TreasuryStockSharesAcquired	199,323us-gaap_TreasuryStockSharesAcquired
Acquisition of Subsidiary - Shares	3,595	9,503	9,356
Allocation of ESOP Stock - Shares	17,300	16,969	16,629

Aggregate dividends paid during the period for each share of common stock outstanding.

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Number of shares of common and preferred stock issued as dividends during the period. Excludes stock splits.

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Number of shares of stock issued during the period pursuant to acquisitions.

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

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Number of shares issued during the period from a dividend reinvestment plan (DRIP). A dividend reinvestment plan allows the shareholders to reinvest dividends paid to them by the entity on new issues of stock by the entity.

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Number of shares of capital stock issued (purchased by employees) in connection with an employee stock ownership plan.

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-Name Regulation S-X (SX)

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Number of shares issued during the period as a result of an employee stock purchase plan.

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Number of shares of stock issued during the period that is attributable to transactions involving issuance of stock not separately disclosed.

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No definition available.

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Gross number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP). Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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Number of shares that have been repurchased during the period and are being held in treasury.

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