Divestiture Related Activities (Details) (USD $)	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
(Losses) gains on divestitures	$ (8,526,000)	$ 16,547,000	$ 20,787,000
Impairment losses	(2,451,000)	(8,035,000)	(16,534,000)
(Losses) gains on divestitures and impairment charges, net	(10,977,000)	8,512,000	4,253,000
Keystone [Member]
(Losses) gains on divestitures		6,200,000
Proceeds from Divestiture of Businesses		$ 34,900,000

The gain (loss) resulting from the sale of a disposal group that is not a discontinued operation. It is included in income from continuing operations before income taxes in the income statement.

+ References+ Details

The loss (gain) resulting from the write-down of the carrying value of assets classified as a disposal group, but one which is not further classified as a discontinued operation, to fair value less cost to sell. A (gain) results from a subsequent increase in fair value less cost to sell, but not in excess of the cumulative loss previously recognized. For example, the write-down of a disposal group subject to a plan of sale, which was not sold in the current period, to its held-for-sale value. The loss (gain) is included in income from continuing operations before income taxes in the income statement.

+ References+ Details