Exit Activities and Reductions in Force (Details) (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Summary of exit activities and reduction in force initiatives
Accrual, Beginning balance	$ 670	$ 6,751
Charges	4,811	2,789
Cash Payments	(4,518)	(6,128)
Non-cash Amounts	(936)	(282)
Accrual, Ending balance	27	3,130
Employee Separation Costs [Member]
Summary of exit activities and reduction in force initiatives
Accrual, Beginning balance	670	3,938
Charges	4,811	2,466
Cash Payments	(4,518)	(3,274)
Non-cash Amounts	(936)	0
Accrual, Ending balance	27	3,130
Contractual Obligations [Member]
Summary of exit activities and reduction in force initiatives
Accrual, Beginning balance	0	2,813
Charges	0	41
Cash Payments	0	(2,854)
Non-cash Amounts	0	0
Accrual, Ending balance	0	0
Asset Impairments [Member]
Summary of exit activities and reduction in force initiatives
Accrual, Beginning balance	0	0
Charges	0	282
Cash Payments	0
Non-cash Amounts	0	(282)
Accrual, Ending balance	$ 0	$ 0