Consolidated Statements of Changes in Stockholders’ Equity (Unaudited) (Parentheticals) (USD $) In Thousands, except Share data	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash dividends declared and paid on common shares, per share (in Dollars per share)	$ 0.39	$ 0.39
Shares Repurchased To Satisfy Tax Obligations [Member] | Treasury Stock [Member]
Repurchase of shares (in Shares)	27,441	26,443
Shares Repurchased To Pay For Option Exercise [Member] | Treasury Stock [Member]
Repurchase of shares (in Shares)	3,794	26,011
Common Stock [Member]
Issuance upon exercise of stock options (in Shares)	155,061	18,994
Shares issued upon vesting of restricted stock unit awards (in Shares)	119,600	87,821
Additional Paid-in Capital [Member]
Issuance upon exercise of stock options (in Shares)	155,061	18,994
Shares issued upon vesting of restricted stock unit awards (in Shares)	119,800	103,109
Award of common shares released from Employee Benefit Trust (in Shares)	140,298	130,499
Treasury Stock [Member]
Issuance upon exercise of stock options (in Shares)	23,129	37,266
Shares issued upon vesting of restricted stock unit awards (in Shares)	200	18,583
Repurchase of shares (in Shares)	362,050
Unearned Compensation [Member]
Award of common shares released from Employee Benefit Trust (in Shares)		143,995
Retained Earnings [Member]
Issuance upon exercise of stock options (in Shares)	23,129	37,266
Shares issued upon vesting of restricted stock unit awards (in Shares)		3,295
Cash dividends declared and paid on common shares, per share (in Dollars per share)	$ 0.39	$ 0.39
Accumulated Other Comprehensive Income (Loss) [Member]
Change in net unrealized gains on securities available for sale, tax effect	$ (8,707)	$ (8,548)
Amortization of actuarial losses, tax effect	(183)	(103)
Amortization of prior service (credits) costs, tax effect	15	13
OTTI charges included in income, tax effect	(693)	(683)
Reclassification adjustment for gains included in net income, tax effect		$ 28