Preferred Share Issuance and Merger - Purchase Consideration (Details) - BCP IV GrafTech Holdings LP [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands |
Aug. 11, 2015 |
May. 18, 2015 |
---|---|---|
Business Acquisition [Line Items] | ||
Amount | $ 854,337 | |
Convertible preferred equity - Series A and B | ||
Business Acquisition [Line Items] | ||
Shares | 150 | |
Unit Price | $ 1,000,000 | |
Amount | $ 150,000 | $ 150,000 |
Merger common equity - common shares | ||
Business Acquisition [Line Items] | ||
Shares | 139,397 | |
Unit Price | $ 5,050 | |
Amount | $ 703,955 | |
Net value of options | ||
Business Acquisition [Line Items] | ||
Amount | $ 382 |