Stockholders Equity (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Oct. 27, 2014
Stockholders Equity [Abstract]
Unrecognized prior service cost and net actuarial loss on pension plans	$ (19,181,000)	$ (7,785,000)
Unrealized net holding (losses) gains on available for sale securities	2,154,000	(8,980,000)
Accumulated other comprehensive loss	(17,027,000)	(16,765,000)
Class of Warrant or Right [Line Items]
Future dividend payment restrictions	The approval of the Office of Comptroller of the Currency (OCC) is required to pay dividends when a bank fails to meet certain minimum regulatory capital standards or when such dividends are in excess of a subsidiary bank's earnings retained in the current year plus retained net profits for the preceding two years as specified in applicable OCC regulations.
Preceding period of retained net profits for approval of Office of Comptroller of the Currency (in years)	2 years
Statutory amount available for dividend payments	88,700,000
Common stock repurchased during period (in shares)	3,288	584,925	769,568
Common stock repurchased during period	$ 100,000
Treasury Stock Acquired, Average Cost Per Share	$ 22.02
Stock Repurchase Program, Number Of Additional Shares Authorized To Be Repurchased				1,000,000