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Joint Ventures and Noncontrolling Interests (Details) - item | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Oct. 23, 2018
Joint Ventures and Noncontrolling Interests |  |
Number of joint ventures in which the entity has a noncontrolling interest | 2 |
Eagle Steel Products, Inc. |  |
Joint Ventures and Noncontrolling Interests |  |
Ownership percentage in equity method investment | 45.00% |
Oregon Feralloy Partners LLC |  |
Joint Ventures and Noncontrolling Interests |  |
Ownership percentage in equity method investment | 40.00% |
Acero Prime S. de R.L. de C.V. |  |
Joint Ventures and Noncontrolling Interests |  |
Ownership percentage in consolidated investments other than equity method investment | 100.00% | 60.00%
Feralloy Processing Company |  |
Joint Ventures and Noncontrolling Interests |  |
Ownership percentage in consolidated investments other than equity method investment | 51.00% |
Indiana Pickling & Processing Company |  |
Joint Ventures and Noncontrolling Interests |  |
Ownership percentage in consolidated investments other than equity method investment | 56.00% |
Valex Corp. | South Korea |  |
Joint Ventures and Noncontrolling Interests |  |
Ownership percentage in consolidated investments other than equity method investment | 95.00% |
Minimum |  |
Joint Ventures and Noncontrolling Interests |  |
Ownership percentage in equity method investment | 20.00% |
Percentage of ownership for consolidation of financial statements | 50.00% |
Maximum |  |
Joint Ventures and Noncontrolling Interests |  |
Ownership percentage in equity method investment | 50.00% |

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