Condensed Consolidated Statements of Shareholders' Equity (Unaudited) (Parenthetical) (USD $) In Thousands, except Per Share data	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Income tax on unrecognized actuarial gain and prior service costs	$ 411	$ 993
Income tax on cash flow hedge activity	13	147
Treasury shares purchased	4
Stock option exercises and other shares issued to employees and directors, shares	137	149
Dividends declared, per common share	$ 0.22	$ 0.18
Additional Paid-in Capital
Stock option exercises and other shares issued to employees and directors, shares	137	149
Treasury Shares
Treasury shares purchased	4
Stock option exercises and other shares issued to employees and directors, shares	137	149
Accumulated Other Comprehensive Loss
Income tax on unrecognized actuarial gain and prior service costs	411	993
Income tax on cash flow hedge activity	$ 13	$ 147
Retained Earnings
Dividends declared, per common share	$ 0.22	$ 0.18