Basis of Presentation

6 Months Ended

Jun. 30, 2012

Accounting Policies [Abstract]

Significant Accounting Policies

Basis of Presentation

OM Group, Inc. ("OMG", the “Company”, “we”, “our”, “us”) is a diversified specialty chemicals and engineered materials company serving attractive global markets, including mobile energy storage, electronic devices, automotive systems and renewable energy. We develop, produce and distribute innovative, high-quality chemicals, materials, products and technologies that contribute to our customers' success by addressing their complex applications and demanding requirements.

The consolidated financial statements include the accounts of OMG and its consolidated subsidiaries. Intercompany accounts and transactions have been eliminated in consolidation. We have a 55% interest in a joint venture (“GTL”) that owns a smelter in the Democratic Republic of Congo (the “DRC”). The joint venture is consolidated because we have a controlling interest in the joint venture. Noncontrolling interest is recorded for the remaining 45% interest.

On August 2, 2011, we completed our acquisition of VAC Holding GmbH (“VAC”). The Magnetic Technologies segment consists of VAC.The financial position, results of operations and cash flows of VAC are included in the Consolidated Financial Statements from the date of acquisition.

These financial statements have been prepared in accordance with U.S. generally accepted accounting principles for interim financial information and the instructions to Form 10-Q and do not include all of the information and footnotes required by U.S. generally accepted accounting principles for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation of the financial position of the Company at June 30, 2012 and the results of its operations, comprehensive income (loss), cash flows and changes in total equity for the six months ended June 30, 2012 and 2011 have been included. The balance sheet at December 31, 2011 has been derived from the audited consolidated financial statements at that date but does not include all of the information or notes required by U.S. generally accepted accounting principles for complete financial statements. Past operating results are not necessarily indicative of the results which may occur in future periods, and the interim period results are not necessarily indicative of the results to be expected for the full year. These Unaudited Condensed Consolidated Financial Statements should be read in conjunction with the consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2011.