Related Parties	12 Months Ended
Dec. 31, 2018
Related Party Transactions [Abstract]
Related Parties	NOTE 26. RELATED PARTIES In some markets, we purchase grid products from WAVE, our 50%-owned joint venture with Worthington Industries, for resale to customers. The total amount of these purchases was $22.5 million in 2018, $18.2 million in 2017 and $18.0 million in 2016. We also provide certain selling, promotional and administrative processing services to WAVE for which we receive reimbursement. Those services amounted to $15.8 million in 2018, $14.9 million in 2017, and $9.1 million in 2016. The net amount due to WAVE from us for all of our relationships was $3.0 million as of December 31, 2018 and $2.6 million as of December 31, 2017. See Note 10 to the Consolidated Financial Statements for additional information.

Related Parties

12 Months Ended

Dec. 31, 2018

NOTE 26. RELATED PARTIES

In some markets, we purchase grid products from WAVE, our 50%-owned joint venture with Worthington Industries, for resale to customers. The total amount of these purchases was $22.5 million in 2018, $18.2 million in 2017 and $18.0 million in 2016. We also provide certain selling, promotional and administrative processing services to WAVE for which we receive reimbursement. Those services amounted to $15.8 million in 2018, $14.9 million in 2017, and $9.1 million in 2016. The net amount due to WAVE from us for all of our relationships was $3.0 million as of December 31, 2018 and $2.6 million as of December 31, 2017. See Note 10 to the Consolidated Financial Statements for additional information.