General	9 Months Ended
Sep. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
General	GENERAL In the opinion of management, the accompanying unaudited consolidated financial statements contain all adjustments (consisting only of normal recurring adjustments) necessary to present fairly the financial position of Stillwater Mining Company (the “Company”) at September 30, 2015, and the results of its operations and cash flows for the nine-month periods ended September 30, 2015 and 2014, respectively. The results of operations for the first nine months of 2015 are not necessarily indicative of the results to be expected for the 2015 year. The accompanying consolidated financial statements in this Quarterly Report on Form 10-Q should be read in conjunction with the consolidated financial statements and notes thereto included in the Company's 2014 Annual Report on Form 10-K (Form 10-K). All intercompany transactions and balances have been eliminated in consolidation. The preparation of the Company’s consolidated financial statements in conformity with United States generally accepted accounting principles (U. S. GAAP) requires management to make estimates and assumptions that affect the amounts reported in these consolidated financial statements and accompanying notes. The more significant areas requiring the use of management’s estimates relate to mineral reserves, reclamation and environmental obligations, valuation allowance for deferred tax assets, useful lives utilized for depreciation, amortization and accretion calculations, future cash flows from long-lived assets, and fair value of derivatives and other financial instruments. Actual results could differ from these estimates. The Company reclassified Marketing expenses into General and administrative for the period ended September 30, 2014, to be consistent with the current presentation in the Company's Consolidated Statements of Comprehensive (Loss) Income.

General

9 Months Ended

Sep. 30, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

GENERAL

In the opinion of management, the accompanying unaudited consolidated financial statements contain all adjustments (consisting only of normal recurring adjustments) necessary to present fairly the financial position of Stillwater Mining Company (the “Company”) at September 30, 2015, and the results of its operations and cash flows for the nine-month periods ended September 30, 2015 and 2014, respectively. The results of operations for the first nine months of 2015 are not necessarily indicative of the results to be expected for the 2015 year. The accompanying consolidated financial statements in this Quarterly Report on Form 10-Q should be read in conjunction with the consolidated financial statements and notes thereto included in the Company's 2014 Annual Report on Form 10-K (Form 10-K). All intercompany transactions and balances have been eliminated in consolidation.

The preparation of the Company’s consolidated financial statements in conformity with United States generally accepted accounting principles (U. S. GAAP) requires management to make estimates and assumptions that affect the amounts reported in these consolidated financial statements and accompanying notes. The more significant areas requiring the use of management’s estimates relate to mineral reserves, reclamation and environmental obligations, valuation allowance for deferred tax assets, useful lives utilized for depreciation, amortization and accretion calculations, future cash flows from long-lived assets, and fair value of derivatives and other financial instruments. Actual results could differ from these estimates.

The Company reclassified Marketing expenses into General and administrative for the period ended September 30, 2014, to be consistent with the current presentation in the Company's Consolidated Statements of Comprehensive (Loss) Income.