Restructuring Charges (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Restructuring Cost and Reserve
Restructuring charges	$ 39,000	$ 2,206,000
Restructuring Reserve [Roll Forward]
Restructuring charges	39,000	2,206,000
2013 Plan
Restructuring Cost and Reserve
Restructuring charges	39,000
Restructuring Reserve [Roll Forward]
Beginning Balance	1,865,000
Restructuring charges	39,000
Payments	(1,746,000)
Ending Balance	158,000
2013 Plan | Minimum
Restructuring Cost and Reserve
Company estimate of the aggregate restructuring cost	3,000,000
2013 Plan | Maximum
Restructuring Cost and Reserve
Company estimate of the aggregate restructuring cost	4,000,000
2013 Plan | Employee Severance and Related Benefits
Restructuring Cost and Reserve
Restructuring charges	39,000
Restructuring Reserve [Roll Forward]
Beginning Balance	1,732,000
Restructuring charges	39,000
Payments	(1,613,000)
Ending Balance	158,000
2013 Plan | Facilities
Restructuring Cost and Reserve
Restructuring charges	0
Restructuring Reserve [Roll Forward]
Beginning Balance	133,000
Restructuring charges	0
Payments	(133,000)
Ending Balance	$ 0