Commitments and Contingencies, United States Department of Commerce Antidumping Review (Details) $ in Millions		12 Months Ended
	Oct. 05, 2016 Individual	Dec. 31, 2016 USD ($) ImportEntry	Jun. 21, 2011	Apr. 19, 2010
United States Department of Commerce Antidumping Review [Member]
Loss Contingencies [Line Items]
Assignment of antidumping duty rate on U.S. imports by Company subsidiaries			19.80%	48.33%
Payment request for interest and duties | $		$ 3.0
Number of import entries | ImportEntry		795
Equal Employment Opportunity Commission Matter [Member]
Loss Contingencies [Line Items]
Number of identified class individuals	20
Number of unidentified class individuals	150