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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Accumulated Other Comprehensive Loss, Net of Deferred Taxes:
Cumulative effect adjustment for the adoption of ASC 320-10-65, tax	$ 0	$ 0	$ 1,034
Change in unrealized loss on available-for-sale securities during the period, deferred benefit (tax)	605	858	(4,409)
Unrecognized (loss) gain of pension and other postretirement obligations,tax	$ 2,933	$ 1,273	$ (1,021)

Tax effect on the accumulated change in the value of either the projected benefit obligation or plan assets resulting from experience different from that assumed or from a change in an actuarial assumption that has not been recognized in net periodic benefit cost.

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