Accrued Restructuring - Restructuring Reserve Rollforward (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Restructuring Cost and Reserve [Line Items]
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	$ 395,000	$ 4,107,000	$ 1,740,000	$ (5,145,000)
Facility Reductions	(155,000)	259,000	(155,000)	1,590,000
Business Combination, Integration Related Costs	515,000	0	515,000	576,000
Balance accrued as of December 31, 2012			1,188,000
Restructuring Charges			4,138,000
Restructuring Reserve, Accrual Adjustment			(212,000)
Expenditures			(2,694,000)
Balance accred as of March 31, 2013	2,420,000		2,420,000
Restructuring Reserve, Noncurrent	200,000		200,000
Severance Costs	2,916,000	1,131,000	4,081,000	2,745,000
Severance, Payroll Taxes and Other Employee Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Balance accrued as of December 31, 2012			198,000
Restructuring Charges			4,138,000
Restructuring Reserve, Accrual Adjustment			(57,000)
Expenditures			(2,417,000)
Balance accred as of March 31, 2013	1,862,000		1,862,000
Lease Abandonment Charges [Member]
Restructuring Cost and Reserve [Line Items]
Balance accrued as of December 31, 2012			990,000
Restructuring Charges			0
Restructuring Reserve, Accrual Adjustment			(155,000)
Expenditures			(277,000)
Balance accred as of March 31, 2013	$ 558,000		$ 558,000