Consolidated Statements of Changes in Stockholders’ Equity (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Number of shares issued upon the exercise of stock options	463,245
Number of shares purchased for the Treasury	836,092	352,000
Amortization of prior service costs (credit), taxes (in Dollars)	$ 521	$ 436	$ 223
Common Stock [Member]
Number of shares issued upon the exercise of stock options			155,061
Shares issued upon vesting of restricted stock unit awards			119,600
Additional Paid-in Capital [Member]
Number of shares issued upon the exercise of stock options	463,245	125,405	155,061
Shares issued upon vesting of restricted stock unit awards	120,114	113,272	127,653
Release of shares from Employee Benefit Trust, shares	143,941	157,922	144,312
Treasury Stock [Member] | Purchase of Common Shares Outstanding [Member]
Number of shares purchased for the Treasury	836,092	352,000	624,088
Treasury Stock [Member] | Restricted Stock Awards Repurchased To Satisfy Tax Obligations [Member]
Number of shares purchased for the Treasury	61,710	40,148	29,838
Treasury Stock [Member] | Shares Purchased To Fund Options Exercised [Member]
Number of shares purchased for the Treasury	366,517	65,074	3,794
Treasury Stock [Member]
Number of shares issued upon the exercise of stock options	463,245	150,225	23,249
Shares issued upon vesting of restricted stock unit awards	180,997	146,149	8,053
Retained Earnings [Member]
Number of shares issued upon the exercise of stock options	65,470	24,820	23,129
Shares issued upon vesting of restricted stock unit awards	60,883	32,877	7,853
Cash dividends declared and paid on preferred shares, cumulative preferred dividends (in Dollars per share)	$ 0.52	$ 0.52	$ 0.52
Accumulated Other Comprehensive Income (Loss) [Member]
Amortization of prior service costs (credit), taxes (in Dollars)	20	20	20
Amortization of net actuarial losses, taxes (in Dollars)	(541)	(456)	(243)
Unrecognized actuarial (losses) gains, taxes (in Dollars)	(2,527)	340	1,932
Change in net unrealized gains on securities available for sale, taxes (in Dollars)	20,609	(5,259)	(7,706)
Reclassification adjustment for losses (gains) included in net income, taxes (in Dollars)	$ 700	$ (318)	$ (692)