Restructuring, Asset Impairment Charges and Other Items (Details) (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 continued operations
Asset impairment	$ 23,000	$ 44,100
Total restructuring of operations and other items, net	23,719	9,201	36,458
Segment, Continuing Operations [Member]
Restructuring of operations and other items net from continued operations
Total restructuring expenses	16,455	11,942	30,168
Asset impairment	4,931	0	0
Other items, net	2,333	(2,741)	6,290
Total restructuring of operations and other items, net	23,719	9,201	36,458
Segment, Continuing Operations [Member] | Lease and contract terminations [Member]
Restructuring of operations and other items net from continued operations
Total restructuring expenses	6,162	3,678	19,466
Segment, Continuing Operations [Member] | Employees severance and benefits [Member]
Restructuring of operations and other items net from continued operations
Total restructuring expenses	11,326	8,264	10,094
Segment, Continuing Operations [Member] | Other exit costs, net [Member]
Restructuring of operations and other items net from continued operations
Total restructuring expenses	$ (1,033)	$ 0	$ 608