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Summary of Significant Accounting Policies - Principles of Consolidation (Details) | Dec. 31, 2013
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Shanghai STAL Precision Stainless Steel Co Ltd [Member] |
Noncontrolling Interest [Line Items] |
Joint venture ownership percentage | 60.00%
Joint venture ownership percentage by unaffiliated entity | 40.00%
Uniti [Member] |
Noncontrolling Interest [Line Items] |
Equity method investment ownership percentage | 50.00%

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