Commitments and Contingencies (Details) - Sep. 03, 2015 - Subsequent event - USD ($) $ in Millions	Total
Gain Contingencies [Line Items]
Recovery of excessive taxes and interest	$ 4.0
Tax Years 2005 - 2006
Gain Contingencies [Line Items]
Recovery of excessive taxes and interest	1.6
Tax Year 2008
Gain Contingencies [Line Items]
Recovery of excessive taxes and interest	0.9
Selling, and administrative costs | Tax Years 2007, 2009 and 2010
Gain Contingencies [Line Items]
Recovery of excessive taxes and interest	1.6
Minimum | Reduction in taxes | Tax Years 2007 - 2012
Gain Contingencies [Line Items]
Potential aggregate recovery (maximum)	2.8
Maximum | Reduction in taxes | Tax Years 2007 - 2012
Gain Contingencies [Line Items]
Potential aggregate recovery (maximum)	$ 4.6