Severance and Other Charges (Details) - Severance and Other Charges Costs (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Restructuring Cost and Reserve [Line Items]
Total severance and other charges	$ 354	$ 11
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Total severance and other charges	46	11
Contract Termination [Member]
Restructuring Cost and Reserve [Line Items]
Total severance and other charges	43
Legal Settlement [Member]
Restructuring Cost and Reserve [Line Items]
Total severance and other charges	$ 265