Income Taxes Components of Deferred Tax Assets and Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred Tax Assets, Gross [Abstract]
Allowance for Loan Losses	$ 5,794	$ 6,105
Pension and Deferred Compensation Plans	3,999	4,140
Pension Liability Included in Accumulated Other Comprehensive Income	4,426	9,241
Other	566	608
Total Gross Deferred Tax Assets	14,785	20,094
Valuation Allowance for Deferred Tax Assets	0	0
Total Gross Deferred Tax Assets, Net of Valuation Allowance	14,785	20,094
Deferred Tax Liabilities, Gross [Abstract]
Deferred Tax Liabilities, Prepaid Expenses	7,724	8,178
Depreciation	1,561	1,475
Deferred Income	3,526	3,189
Net Unrealized Gains on Securities Available-for-Sale Included in Accumulated Other Comprehensive Income	1,557	3,690
Goodwill	5,230	5,225
Total Gross Deferred Tax Liabilites	$ 19,598	$ 21,757