Income Taxes (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended	3 Months Ended
	Dec. 31, 2012	Sep. 30, 2013
Income Taxes
Noncash tax expense related to the write-off of deferred tax assets in certain foreign jurisdictions		$ 0.3
Deferred tax assets valuation allowance	145.0
Cumulative loss position in the United States	3 years
Percentage of valuation allowance	100.00%
Deferred tax assets, net of valuation allowance	$ 0