Operations and Summary of Significant Accounting Policies - Sale of Product Line (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2014
Sale of Product Line
Severance costs		$ 2.4
CarbonWrap product line
Sale of Product Line
Sale proceeds	$ 3.8
Assets			$ 2.0
Intangible Assets			1.5
Goodwill			$ 0.5
Severance costs	0.5
Pre-tax gain from discontinued operations	$ 1.4