Noncontrolling Interest	3 Months Ended
Noncontrolling Interest	Mar. 31, 2015
Noncontrolling Interest [Abstract]
Noncontrolling Interest	NONCONTROLLING INTEREST In 2012, the Company entered into an agreement with Mitsubishi Corporation (Mitsubishi) in which a Mitsubishi subsidiary acquired a 25% interest in the Company's then wholly-owned subsidiary, Stillwater Canada Inc (SCI) which holds the Marathon PGM-copper project and related properties, for $81.25 million in cash. Mitsubishi also contributed an additional $13.6 million to satisfy its portion of the venture's initial cash call. The agreement provides that Mitsubishi is responsible for funding 25% of the operating, capital and exploration expenditures on the Marathon properties and will cooperate and support efforts to secure financing for Marathon. Under a related supply agreement, Mitsubishi also will have an option to purchase up to 100% of any future Marathon PGM production at a discount to market. The change in the Company's equity as a result of the sale of the noncontrolling interest in SCI was an increase to Additional paid in capital of $42.5 million, offset in part by expenses incurred of $1.1 million. Mitsubishi's 25% interest in the SCI net loss in each period is shown as Net loss attributable to noncontrolling interest in the Company's Consolidated Statements of Comprehensive Income. The amount of this loss is added back to the Company's reported Net income in each period in arriving at Net income attributable to common stockholders. The reported Net loss attributable to noncontrolling interest for the three-months ended March 31, 2015 and 2014 was $0.1 million and $0.5 million, respectively. Mitsubishi's share of the equity in SCI is reflected as Noncontrolling interest in the Company's Consolidated Balance Sheets and totaled $18.4 million and $18.5 million at March 31, 2015 and December 31, 2014, respectively.

The entire disclosure for noncontrolling interest in consolidated subsidiaries, which could include the name of the subsidiary, the ownership percentage held by the parent, the ownership percentage held by the noncontrolling owners, the amount of the noncontrolling interest, the location of this amount on the balance sheet (when not reported separately), an explanation of the increase or decrease in the amount of the noncontrolling interest, the noncontrolling interest share of the net Income or Loss of the subsidiary, the location of this amount on the income statement (when not reported separately), the nature of the noncontrolling interest such as background information and terms, the amount of the noncontrolling interest represented by preferred stock, a description of the preferred stock, and the dividend requirements of the preferred stock.

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