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Consolidated Statements of Stockholders' Equity (Parenthetical) (Accumulated Other Comprehensive Income/(Loss), USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Accumulated Other Comprehensive Income/(Loss)
Tax effect on net unrealized gain on investments	$ 0	$ 644	$ 1,957
Tax effect on net unrealized gain on derivatives	0	0	467
Tax effect on actuarial loss on pension and post-retirement plans	$ 0	$ 0	$ 717

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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- Definition

Tax effect on the change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.

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- Definition

Tax effect on gross appreciation or the gross loss in value of the total of unsold securities during the period being reported on.

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