Income Taxes - Additional Information (Details) (USD $)	9 Months Ended				12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Dec. 31, 2013 Foreign Tax Authority	Dec. 31, 2014 Forecast Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Effective income tax rate	1.80%	29.80%
Federal statutory income tax rate	35.00%
Tax Credit Carryforward, Expiration Period	10 years
Valuation allowance			$ 12,400,000	$ 10,900,000
Release of valuation allowance					5,400,000
Liability for Uncertain Tax Positions, Continuing Operations, Excluding Interest and Penalties	1,300,000		736,000
Liability for Uncertain Tax Positions, Discontinued Operations, Noncurrent	1,100,000		1,100,000
Liability for Uncertain Tax Positions, Noncurrent	$ 2,400,000		$ 1,800,000