Consolidated Statements of Shareholders' Equity and Comprehensive (Loss) Income (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Consolidated Statements of Shareholders Equity and Comprehensive (Loss) Income [Abstract]
Pension Adjustments, income tax expense (benefit)	$ 1,266	$ (98)	$ 1,048
Dividends paid per Common Share (in dollars per share)	$ 0.68	$ 0.59	$ 0.53
Common Stock, shares authorized	60,000,000	60,000,000	60,000,000