Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash Dividends Declared Per Common Share	$ 0.80	$ 0.80	$ 1.18
Retained Earnings
Cash Dividends Declared Per Common Share	$ 0.80	$ 0.80	$ 1.18
Accumulated Other Comprehensive Loss
Net unrealized on investment, net of tax expenses, available-for-sale	$ 10	$ 140	$ 42
Tax expenses for realized gain on call of investment securities			6
Adjustment for pension and other postretirement benefits, net of tax expenses	$ 6,051	$ 928	$ 63