Severance and Other Charges (Details) - Severance and Other Charges Costs (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Restructuring Cost and Reserve [Line Items]
Total severance and other charges	$ 805		$ 1,182	$ 62
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Total severance and other charges	731		800	62
Contract Termination [Member]
Restructuring Cost and Reserve [Line Items]
Total severance and other charges	74		117
Legal Settlement [Member]
Restructuring Cost and Reserve [Line Items]
Total severance and other charges			$ 265