Income Taxes (Details 2) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014
U.S.
Net operating loss carryforwards
Net operating loss carryforwards	$ 45.5
State
Net operating loss carryforwards
Net operating loss carryforwards	36.0
German Trade Tax
Net operating loss carryforwards
Net operating loss carryforwards	47.7
Other foreign countries
Net operating loss carryforwards
Net operating loss carryforwards	$ 10.5