Restructuring, Asset Impairment Charges and Other Items (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Restructuring of operations and other items net from discontinued operations
Total restructuring of operations and other items, net	$ 23,719	$ 9,201	$ 36,458
Segment, Discontinued Operations [Member]
Restructuring of operations and other items net from discontinued operations
Total restructuring expenses	40,863	49,684	59
Other items	0	0	1,729
Total restructuring of operations and other items, net	40,863	49,684	1,788
Segment, Discontinued Operations [Member] | Lease and contract terminations [Member]
Restructuring of operations and other items net from discontinued operations
Total restructuring expenses	2,141	1,951	59
Segment, Discontinued Operations [Member] | Employees severance and benefits [Member]
Restructuring of operations and other items net from discontinued operations
Total restructuring expenses	15,428	3,626	0
Segment, Discontinued Operations [Member] | Other exit costs, net [Member]
Restructuring of operations and other items net from discontinued operations
Total restructuring expenses	$ 23,294	$ 44,107	$ 0