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Restructuring Charges (Details) (USD $)	3 Months Ended		9 Months Ended
Restructuring Charges (Details) (USD $)	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Restructuring Cost and Reserve
Restructuring charges	$ 0	$ 1,129,000	$ 39,000	$ 3,335,000
Restructuring Reserve [Roll Forward]
Restructuring charges	0	1,129,000	39,000	3,335,000
2013 Plan
Restructuring Cost and Reserve
Restructuring charges			39,000
Restructuring Reserve [Roll Forward]
Balance at December 31, 2013			1,865,000
Restructuring charges			39,000
Payments			(1,904,000)
Balance at September 30, 2014	0		0
2013 Plan \| Minimum
Restructuring Cost and Reserve
Company estimate of the aggregate restructuring cost	3,000,000		3,000,000
2013 Plan \| Maximum
Restructuring Cost and Reserve
Company estimate of the aggregate restructuring cost	4,000,000		4,000,000
2013 Plan \| Employee Severance and Related Benefits
Restructuring Cost and Reserve
Restructuring charges			39,000
Restructuring Reserve [Roll Forward]
Balance at December 31, 2013			1,732,000
Restructuring charges			39,000
Payments			(1,771,000)
Balance at September 30, 2014	0		0
2013 Plan \| Facilities
Restructuring Cost and Reserve
Restructuring charges			0
Restructuring Reserve [Roll Forward]
Balance at December 31, 2013			133,000
Restructuring charges			0
Payments			(133,000)
Balance at September 30, 2014	$ 0		$ 0