Restructuring Charges (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Restructuring Liabilities, Beginning balance	$ 3,479
Restructuring Charges	254	0
Cash Payments, net of Receipts on Sublease Activity	(587)
Non-cash Items	0
Adjustments and Changes in Estimates	0
Restructuring Liabilities, Ending balance	3,146
One-Time Termination Benefits [Member]
Restructuring Liabilities, Beginning balance	711
Restructuring Charges	254
Cash Payments, net of Receipts on Sublease Activity	(196)
Non-cash Items	0
Adjustments and Changes in Estimates	0
Restructuring Liabilities, Ending balance	769
Facility Closing [Member]
Restructuring Liabilities, Beginning balance	2,501
Restructuring Charges	0
Cash Payments, net of Receipts on Sublease Activity	(311)
Non-cash Items	0
Adjustments and Changes in Estimates	0
Restructuring Liabilities, Ending balance	2,190
Other Restructuring [Member]
Restructuring Liabilities, Beginning balance	267
Restructuring Charges	0
Cash Payments, net of Receipts on Sublease Activity	(80)
Non-cash Items	0
Adjustments and Changes in Estimates	0
Restructuring Liabilities, Ending balance	$ 187