Severance and Other Charges (Details) - Severance and Other Charges Costs (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Restructuring Cost and Reserve [Line Items]
Total severance and other charges	$ 1,239	$ 889
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Total severance and other charges	596	572
Contract Termination [Member]
Restructuring Cost and Reserve [Line Items]
Total severance and other charges	27	184
Asset Impairment [Member]
Restructuring Cost and Reserve [Line Items]
Total severance and other charges		133
Legal Settlement [Member]
Restructuring Cost and Reserve [Line Items]
Total severance and other charges	$ 616