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Subsequent Events	9 Months Ended
Subsequent Events	Sep. 30, 2017
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On November 1, 2017, we acquired certain net assets of Unimet Metal Supply, Inc. and Alliance Service Centers, Inc. (“Alumet”) for an aggregate purchase price of approximately $40 million, which was paid in cash. Alumet is an aluminum, copper, and brass distribution business with headquarters in New Jersey and five strategically located branches across the United States. The acquisition will be accounted for using the acquisition method of business combination under ASC 805, Business Combinations. The initial accounting for the business combination is incomplete due to the timing of the acquisition. Therefore, we are unable to disclose certain information required by ASC 805. We will provide preliminary purchase price allocation information in our Annual Report on Form 10-K for year ending December 31, 2017.