Income Taxes - Additional Information (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Jun. 01, 2009	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Effective tax rate		75.50%	38.30%	51.90%	35.20%
Increase in refundable income taxes				$ 29.6		$ 18.8	$ 10.2	$ 2.2
Net operating losses carried forward		36.2		36.2
Employment tax credit	$ 10.5