Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) (Unaudited) (USD $) In Thousands, except Per Share data	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Other:
Cash Dividends Declared Per Common Share	$ 0.60	$ 0.60
Retained Earnings (In thousands, except per share data)
Other:
Cash Dividends Declared Per Common Share	$ 0.60	$ 0.60
Accumulated Other Comprehensive Loss (In thousands, except per share data)
Other:
Net unrealized gains on investment, net of tax expense, available-for-sale	$ 139	$ 782
Adjustment for pension and other postretirement benefits, net of tax expense	$ 189	$ 44