CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY [Parenthetical] (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Tax on unrealized holding gains	$ 157	$ 143	$ 14
Tax on reclassification for gains included in net income			14
Tax on change in benefit obligations and plan assets for pension and other postretirement benefits	$ 283	$ 178	$ 486
Purchase of treasury shares (in shares)			3,427
Cash dividends (in dollars per share)	$ 0.02		$ 0.27