SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Exploration and evaluation assets Exploration and Evaluation Assets [Member] Exploration and Evaluation Assets Statistical Measurement [Domain] Statistical Measurement [Domain] Mineral properties, plant and equipment Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment Business Combination, Separately Recognized Transaction [Table] Business Combination, Separately Recognized Transaction [Table] Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Award Timing Predetermined Award Timing Predetermined [Flag] Related Party Transaction [Axis] Related Party Transaction [Axis] Lydia Mines Lydia Mines [Member] Lydia Mines Entity File Number Entity File Number Equity income (loss) of affiliates Income (Loss) from Equity Method Investments Tabular List, Table Tabular List [Table Text Block] Basic: Basic Earnings Per Share, Basic [Abstract] Recently Issued Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Operating Activities [Axis] Operating Activities [Axis] Accounts payable Increase (Decrease) in Accounts Payable Accrued and other liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accrued Liabilities and Other Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accrued Liabilities and Other Corporate and Other Corporate And Reconciling Items [Member] Corporate And Reconciling Items Schedule of Fair Value, by Balance Sheet Grouping Fair Value, by Balance Sheet Grouping [Table Text Block] Schedule of Operating, Investing and Financing Cash Flow Information for Discontinued Operations Disposal Groups, Including Discontinued Operations [Table Text Block] Interest income Interest Income (Expense), Nonoperating Contingent consideration Business Combination, Consideration Transferred, Liabilities Incurred Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Measurement Basis [Axis] Measurement Basis [Axis] Basic (in dollars per share) Earnings Per Share, Basic Adjustment to Compensation: Adjustment to Compensation [Axis] RELATED PARTY TRANSACTIONS Related Party Transactions Disclosure [Text Block] Trade receivables from provisional sales, net Receivables, Fair Value Disclosure Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Liabilities: Liabilities, Fair Value Disclosure [Abstract] Net cash provided by (used in) financing activities of continuing operations Cash Provided by (Used in) Financing Activity, Continuing Operation Discontinued operations Net loss (income) from discontinued operations attributable to non-controlling interest Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Noncontrolling Interest REVENUE Revenue from Contract with Customer [Text Block] Schedule of Segment Reporting Information, by Segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Discontinued operations (in dollars per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share Inventory Disclosure [Abstract] Convertible threshold percentage of stock price trigger Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger Settlement of restricted share units (RSUs) (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Concentrate sales Concentrate Sales [Member] Concentrate Sales Total from Continuing Operations Continuing Operations [Member] Adjustment to Compensation, Amount Adjustment to Compensation Amount Discount and debt issuance costs Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Other operating assets Increase (Decrease) in Other Operating Assets Schedule of Inventory, Noncurrent Schedule of Inventory, Noncurrent [Table Text Block] Stock-based compensation Share-Based Payment Arrangement, Noncash Expense Employee Stock Option Share-Based Payment Arrangement, Option [Member] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Income taxes paid Income Taxes Paid Variable Interest Entity, Primary Beneficiary Variable Interest Entity, Primary Beneficiary [Member] SSR Mining’s shareholders’ equity Equity, Attributable to Parent Insider Trading Policies and Procedures [Line Items] Schedule of Mineral Properties, Plant and Equipment, Net Property, Plant and Equipment [Table Text Block] Surety Bond Surety Bond [Member] Total liabilities and equity  Liabilities and Equity LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Working capital adjustment Business Combination, Working Capital Adjustment Business Combination, Working Capital Adjustment Cover [Abstract] Cash Cash and Cash Equivalents, Fair Value Disclosure Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] HELD FOR SALE AND DISCONTINUED OPERATIONS Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Number of consecutive trading days Debt Instrument, Convertible, Threshold Consecutive Trading Days Maximum Maximum [Member] General and Administrative Expense General and Administrative Expense [Member] Average price per ounce/pound (in dollars per ounce/pound) Derivative, Average Forward Price Accounting Policies [Abstract] Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Debt Instrument [Line Items] Debt Instrument [Line Items] Net income (loss) from continuing operations Net income (loss) from continuing operations Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Pay vs Performance Disclosure [Line Items] Other Other Products [Member] Other Products Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount LIABILITIES Liabilities held for sale: Liabilities [Abstract] Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Depreciation, depletion, and amortization Depreciation, depletion, and amortization Depreciation, Depletion and Amortization, Nonproduction Outstanding diesel collar contracts with an aggregate notional volume Derivative, Nonmonetary Notional Amount, Volume Liabilities held for sale Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent Income (loss) before income and mining taxes Income (loss) before income and mining taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company Other non-current liabilities Other Liabilities, Noncurrent Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Deferred consideration assets: Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Seabee Seabee Seabee Segment [Member] Seabee Segment Statement of Stockholders' Equity [Abstract] Operating Segments Operating Segments [Member] Schedule of Cash Flow, Supplemental Disclosures Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Copler Copler [Member] Copler Current portion of debt Current Portion Long-Term Debt, Current Maturities Statement of Cash Flows [Abstract] Company Selected Measure Amount Company Selected Measure Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Care and maintenance Care And Maintenance Expense Care And Maintenance Expense Hod Maden Hod Maden [Member] Hod Maden Disposal Group Name [Domain] Disposal Group Name [Domain] Name Measure Name Continuing operations Net income (loss) attributable to SSR Mining shareholders from continuing operations Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent Lease liabilities Operating Lease, Liability, Current Schedule of Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Deferred income tax liabilities Deferred Income Tax Liabilities, Net Document Fiscal Period Focus Document Fiscal Period Focus Discontinued operations Net income (loss) attributable to SSR Mining shareholders Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent Unsecured Debt Unsecured Debt [Member] Gain (loss) on investments and on marketable securities sales Gain (Loss) On Investments And Marketable Security Sales Gain (Loss) On Investments And Marketable Security Sales Award Timing Method Award Timing Method [Text Block] Continuing operations (in dollars per share) Income (Loss) from Continuing Operations, Per Basic Share Award Type [Axis] Award Type [Axis] Exploration and evaluation Exploration and evaluation Exploration And Evaluation Exploration And Evaluation Legal Entity [Axis] Legal Entity [Axis] Schedule of Business Combination, Pro Forma Information Business Combination, Pro Forma Information [Table Text Block] Total assets Assets Total assets Assets Trading Symbol Trading Symbol Other taxes Other Tax Expense (Benefit) Entity Address, City or Town Entity Address, City or Town Operating activities     Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Change in fair value of marketable securities Marketable Security, Gain (Loss) Business Combination, Pro Forma Information [Line Items] Business Combination, Pro Forma Information [Line Items] Effect of foreign exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation INVENTORIES Inventory Disclosure [Text Block] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Restricted share units Restricted Stock Units (RSUs) [Member] Statement of Income Location, Balance [Domain] Statement of Income Location, Balance [Domain] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Total Purchase Price Business Combination, Consideration Transferred Assets: Assets, Fair Value Disclosure [Abstract] Entity Emerging Growth Company Entity Emerging Growth Company Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Decrease (increase) in operating assets: Increase (Decrease) in Operating Assets [Abstract] Total assets Business Combination, Recognized Asset Acquired, Asset Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Additions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases CC&V CC&V Cripple Creek & Victor Gold Mine Segment [Member] Cripple Creek & Victor Gold Mine Segment Business Combination [Domain] Business Combination [Domain] Loss (gain) on sale and disposal of assets, net Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal Aggregate closure costs Business Combination, Closure Cost Threshold Business Combination, Closure Cost Threshold Related Party Related Party [Member] Common shares, outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding Loss (gain) on sale and disposal of assets, net Gain (Loss) on Disposition of Other Assets PEO PEO [Member] TRADE AND OTHER RECEIVABLES Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Schedule of Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Proceeds from the issuance of debt, related party Proceeds from Related Party Debt Silver Silver [Member] Silver Income (loss) before income and mining taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Income taxes payable Accrued Income Taxes, Current Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Retained earnings Retained Earnings [Member] Prepaids and other current assets Prepaid Expense and Other Assets, Current Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Cash and cash equivalents beginning of period Cash and cash equivalents end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement [Abstract] Derivative assets Derivative Asset Income and mining tax benefit (expense) Income Tax Expense (Benefit) Purchases of marketable securities Payments to Acquire Marketable Securities Discontinued operations (in dollars per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share Accumulated depletion, mineral properties Mineral Properties, Accumulated Depletion Balance as of January 1 Balance as of March 31 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Marketable securities Investments, Fair Value Disclosure Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Normal Course Issuer Bid Normal Course Issuer Bid [Member] Normal Course Issuer Bid Product and Service [Domain] Product and Service [Domain] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Continuing operations (in dollars per share) Income (Loss) from Continuing Operations, Per Diluted Share Total equity attributable to SSR Mining shareholders Parent [Member] Net income (loss) Net income (loss) Net income (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Stock repurchase program, period in force Share Repurchase Program, Period in Force Total liabilities Liabilities, Fair Value Disclosure Business Combination [Table] Business Combination [Table] Direct costs Operating Expenses, Excluding Depreciation And Asset Retirement Obligation Costs Operating Expenses, Excluding Depreciation And Asset Retirement Obligation Costs Discontinued Operations and Disposal Groups [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Other Income and Expenses [Abstract] Schedule of Business Combination, Recognized Asset Acquired and Liability Assumed Business Combination, Recognized Asset Acquired and Liability Assumed [Table Text Block] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Equity, Class of Treasury Stock [Line Items] Equity, Class of Treasury Stock [Line Items] Held for Sale and Discontinued Operations Assets Held for Sale And Discontinued Operations Policy [Policy Text Block] Assets Held for Sale And Discontinued Operations Policy Proceeds from exercise of stock options Proceeds from Stock Options Exercised Accumulated depreciation, plant and equipment Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, Accumulated Depreciation and Amortization City Area Code City Area Code Redemption of remaining unconverted principal amount Debt Instrument, Convertible, Redemption Of Remaining Unconverted Principal Amount Debt Instrument, Convertible, Redemption Of Remaining Unconverted Principal Amount ACQUISITIONS AND DIVESTITURES Mergers, Acquisitions and Dispositions Disclosures [Text Block] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Accrued liabilities Accrued Liabilities, Current Class of Treasury Stock [Table] Class of Treasury Stock [Table] Payments Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements Commitments and Contingencies Disclosure [Abstract] Net cash used in investing activities of discontinued operations Cash Provided by (Used in) Investing Activity, Discontinued Operation Reclamation and remediation costs Asset Retirement Obligation, Costs, Non-Cash Asset Retirement Obligation, Costs, Non-Cash Calik Holding Calik Holding [Member] Calik Holding Investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] General and administrative expense General and administrative expense General and Administrative Expense Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Net cash provided by (used in) operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Debt instrument, term Debt Instrument, Term Related Party Transactions [Abstract] Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Concentrate Metal Sales Agreement Concentrate Metal Sales Agreement [Member] Concentrate Metal Sales Agreement PEO Total Compensation Amount PEO Total Compensation Amount Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Depreciation Depreciation Impairment charges Tangible Asset Impairment Charges Assets: Business Combination, Recognized Asset Acquired, Asset [Abstract] Reclamation and remediation costs Reclamation and remediation costs Asset Retirement Obligation, Costs Asset Retirement Obligation, Costs Equity Components [Axis] Equity Components [Axis] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Net cash provided by (used in) financing activities of discontinued operations Cash Provided by (Used in) Financing Activity, Discontinued Operation Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Number of reportable segments Number of Reportable Segments Other Other Expense (Income), Miscellaneous Other Expense (Income), Miscellaneous Supplemental Cash Flow Information [Abstract] Trade and other receivables Business Combination, Recognized Asset Acquired, Receivable, Current Other Performance Measure, Amount Other Performance Measure, Amount Inventory [Line Items] Inventory [Line Items] Entity Address, State or Province Entity Address, State or Province Principal payments on finance leases Finance Lease, Principal Payments Assets held for sale Disposal Group, Including Discontinued Operation, Assets, Noncurrent Related Party, Type [Domain] Related and Nonrelated Parties [Domain] Total current liabilities Liabilities, Current Inventory [Axis] Inventory [Axis] Derivative Instrument [Axis] Derivative Instrument [Axis] Individual: Individual [Axis] Total mineral properties, plant, and equipment Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, before Accumulated Depreciation and Amortization Net income (loss) per share attributable to SSR Mining shareholders Earnings Per Share Reconciliation [Abstract] Entity [Domain] Entity [Domain] Net cash used in investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activity Document Fiscal Year Focus Document Fiscal Year Focus Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Stock-based compensation liabilities Accrued Employee Benefits, Current Effective income tax rate reconciliation, rate (as a percent) Effective Income Tax Rate Reconciliation, Percent Entity Interactive Data Current Entity Interactive Data Current Adjustment to fair value Adjustment To Fair Value Adjustment To Fair Value Amortization of advance royalty Amortization of Advance Royalty Carrying amount Reported Value Measurement [Member] Prepayments, related party Increase (Decrease) in Accounts Receivable, Related Parties Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Exercise of stock options (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Equity [Abstract] Business Combination, Contingent Consideration, Type [Axis] Business Combination, Contingent Consideration, Type [Axis] OPERATING SEGMENTS Segment Reporting Disclosure [Text Block] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Debt conversion, converted shares (in shares) Convertible Preferred Stock, Shares Issued upon Conversion Notional ounce/pound Derivative, Nonmonetary Notional Amount, Mass Long-Lived Tangible Asset [Axis] Long-Lived Tangible Asset [Axis] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Ownership [Domain] Ownership [Domain] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Contingent consideration liabilities Business Combination, Contingent Consideration, Liability Environmental bonding obligation, outstanding Environmental Bonding Obligation, Outstanding Environmental Bonding Obligation, Outstanding Stock repurchase program, common shares authorized to be repurchased (in shares) Share Repurchase Program, Authorized, Number of Shares Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Deferred income tax assets Deferred Income Tax Assets, Net Capital expenditures Payments to Acquire Productive Assets Depreciation, depletion, and amortization Depreciation, Depletion and Amortization Other non-current assets Other Assets, Noncurrent Royalties payable Accrued Royalties, Current Entity Central Index Key Entity Central Index Key PEO Name PEO Name Revenue Revenue Revenues Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Adjustments for dilutive instruments, 2019 Notes (in shares) Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Balance as of January 1 Balance as of March 31 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Contingent consideration liabilities Business Combination, Contingent Consideration, Liability, Noncurrent Arrangement Duration Trading Arrangement Duration Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Lead Lead [Member] Lead Schedule of Other Operating Expense (Income), Net Schedule of Other Operating Cost and Expense, by Component [Table Text Block] Inventories Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Inventory Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Inventory Segments [Axis] Segments [Axis] Work-in-process Inventory, Work in Process, Net of Reserves Çöpler Mine Çöpler Mine [Member] Çöpler Mine Exercise Price Award Exercise Price Stockpiled ore Stockpiled Ore [Member] Stockpiled Ore Entity Filer Category Entity Filer Category Net loss (income) attributable to non-controlling interest, net of tax: Income Amounts Attributable to Parent, Disclosures [Abstract] Local Phone Number Local Phone Number Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Inventory [Table] Inventory, Current [Table] Effective income tax rate reconciliation, statutory rate (as a percent) Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Other operating activities Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item Contingent consideration liabilities Business Combination, Contingent Consideration, Liability, Current Consideration in cash Disposal Group, Including Discontinued Operation, Consideration Permit Application Approval And Regulatory Relief, Carlton Tunnel Permit Application Approval And Regulatory Relief, Carlton Tunnel [Member] Permit Application Approval And Regulatory Relief, Carlton Tunnel ASSETS Assets held for sale: Assets [Abstract] Debt, related party Debt Long-Term Debt, Excluding Current Maturities Inventories Inventories, noncurrent Inventory, Noncurrent Nonrelated Party Nonrelated Party [Member] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Debt Instrument [Axis] Debt Instrument [Axis] FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS Fair Value Disclosures [Text Block] Business Combination [Line Items] Business Combination [Line Items] Reclamation liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Reclamation Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Reclamation Liabilities Leach pad inventory Leach Pad Inventory [Member] Leach Pad Inventory Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two Interest rate, stated (as a percent) Debt Instrument, Interest Rate, Stated Percentage Provision for credit loss Accounts Receivable, Allowance for Credit Loss, Current Related Party Loan Related Party Loan [Member] Related Party Loan Conversion of 2019 Notes (in shares) Stock Issued During Period, Shares, Conversion of Convertible Securities Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] Ownership [Axis] Ownership [Axis] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Fair Value as of Grant Date Award Grant Date Fair Value Property, Plant and Equipment [Abstract] Entity Registrant Name Entity Registrant Name Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table] Earnings Per Share, Diluted, by Common Class, Including Two-Class Method [Table] Disposal Group, Held-for-sale, Not Discontinued Operations Disposal Group, Held-for-Sale, Not Discontinued Operations [Member] Schedule of Other Income (Expense) Schedule of Other Nonoperating Income (Expense) [Table Text Block] Other taxes Taxes, Other Adjustments for dilutive instruments, Restricted share units (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Gold Gold [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Document Quarterly Report Document Quarterly Report Adjustments to additional paid in capital, stock issued, issuance costs Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs Total assets Assets, Fair Value Disclosure Number of producing assets Number Of Producing Assets Number Of Producing Assets Deferred income taxes Deferred Income Taxes and Tax Credits Debt Long-Term Debt, Fair Value Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Finance lease, right-of-use asset, before accumulated amortization Finance Lease, Right-of-Use Asset, before Accumulated Amortization Number of operating segments Number of Operating Segments Other Other Nonoperating Income (Expense), Other Other Nonoperating Income (Expense), Other Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Schedule of Debt Schedule of Debt [Table Text Block] Schedule of Accrued Liabilities and Other Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Related Party, Type [Axis] Related and Nonrelated Parties [Axis] Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Net cash provided by (used in) operating activities of continuing operations Cash Provided by (Used in) Operating Activity, Continuing Operation Cash consideration Payments To Acquire Businesses, Gross, Adjustment Payments To Acquire Businesses, Gross, Adjustment Restatement Determination Date: Restatement Determination Date [Axis] Acquisitions, net Cash consideration Upfront cash Payments to Acquire Businesses, Gross Non-PEO NEO Non-PEO NEO [Member] Net cash used in investing activities of continuing operations Cash Provided by (Used in) Investing Activity, Continuing Operation Reclamation and remediation liabilities Reclamation and remediation liabilities, current Asset Retirement Obligation, Current Mineral properties, plant and equipment, net Mineral properties, plant, and equipment, net Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization Including Mineral Properties, Accumulated Depletion, Current Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization Including Mineral Properties, Accumulated Depletion, Current Other financing activities Proceeds from (Payment for) Other Financing Activity Interest expense, debt Interest Expense, Debt Business Combination, Pro Forma Information [Table] Business Combination, Pro Forma Information [Table] Liabilities: Business Combination, Recognized Liability Assumed, Liability [Abstract] Name Trading Arrangement, Individual Name Award Type [Domain] Award Type [Domain] Non-controlling interest Equity, Attributable to Noncontrolling Interest Equity Awards Adjustments Equity Awards Adjustments [Member] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Mineral properties subject to depletion Mineral Properties Subject To Depletion [Member] Mineral Properties Subject To Depletion Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] OTHER OPERATING EXPENSE (INCOME), NET Other Operating Income and Expense [Text Block] Trade and other receivables Increase (Decrease) in Accounts and Other Receivables Compensation Amount Outstanding Recovery Compensation Amount Face amount Debt Instrument, Face Amount Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Fair value Estimate of Fair Value Measurement [Member] Plant and equipment Plant and Equipment [Member] Plant and Equipment 2019 Notes 2019 Notes [Member] 2019 Notes Share Repurchase Program [Axis] Share Repurchase Program [Axis] Loss (gain) on foreign exchange Foreign Currency Transaction Gain (Loss), Value-Added Tax Receivables and Investments Foreign Currency Transaction Gain (Loss), Value-Added Tax Receivables and Investments Materials and supplies Materials And Supplies [Member] Materials And Supplies MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Name Awards Close in Time to MNPI Disclosures, Individual Name ACCRUED LIABILITIES AND OTHER Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] Zinc Zinc [Member] Zinc Change in fair value of contingent consideration Business Combination, Contingent Consideration, Change in Contingent Consideration, Liability, Increase (Decrease) Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Net change in operating assets and liabilities   Net change in operating assets and liabilities   Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital Conversion of 2019 Notes Stock Issued During Period, Value, Conversion of Convertible Securities Inventory [Domain] Inventory [Domain] Deferred income tax liabilities Deferred Tax Liabilities, Gross Related Party Line of Credit Related Party Line of Credit [Member] Related Party Line of Credit Segments [Domain] Segments [Domain] Statement of Income Location, Balance [Axis] Statement of Income Location, Balance [Axis] Value added tax receivables Value Added Tax Receivable, Current Other Other Metals [Member] Other Metals Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Inventories Increase (Decrease) in Inventories Inventories Inventories, current Total current inventories Inventory, Net Minimum Minimum [Member] Net income (loss) from discontinued operations used in the calculation of diluted net income per share Net Income (Loss) from Discontinued Operations Available to Common Shareholders, Diluted Net income (loss) from continuing operations used in the calculation of diluted net income per share Net Income (Loss) from Continuing Operations Available to Common Shareholders, Diluted Company Selected Measure Name Company Selected Measure Name Advances to joint partner Payments for Advance to Affiliate Fair Value Measurement [Domain] Fair Value Measurement [Domain] Net income attributable to SSR Mining shareholders Business Combination, Pro Forma Information, Pro Forma Income (Loss), after Tax Convertible Senior Notes Senior Notes [Member] Stock repurchased and retired during period, cost per share (in dollars per share) Stock Repurchased During Period, Cost Per Share Stock Repurchased During Period, Cost Per Share DEBT Debt Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Accounts payable Accounts Payable, Current Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Deferred income tax liabilities, non-current Deferred Income Tax Liabilities, Non-Current Deferred Income Tax Liabilities, Non-Current Discontinued Operations Discontinued Operations [Member] Total liabilities Business Combination, Recognized Liability Assumed, Liability All Executive Categories All Executive Categories [Member] Finished goods Inventory, Finished Goods, Net of Reserves Common shares – unlimited authorized common shares with no par value; 216,512 and 203,001 shares issued and outstanding as of March 31, 2026 and December 31, 2025, respectively Common Stock, Value, Issued Operating Activities [Domain] Operating Activities [Domain] Prepaids and other current assets Business Combination, Recognized Asset Acquired, Prepaid Expense and Other Asset, Current COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Diluted (in shares) Diluted weighted average number of shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Transaction and integration cost Transaction and integration costs Business Combination, Integration-Related Cost, Expense Increase (decrease) in operating liabilities: Increase (Decrease) in Operating Liabilities [Abstract] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Raw materials Inventory, Raw Materials and Supplies, Net of Reserves Business Combination [Axis] Business Combination [Axis] Entity Small Business Entity Small Business Income Tax Disclosure [Abstract] Non-controlling interest  Noncontrolling Interest [Member] Document Transition Report Document Transition Report Schedule of Fair Value Disclosure of Asset and Liability Not Measured at Fair Value Fair Value Disclosure of Asset and Liability Not Measured at Fair Value [Table Text Block] Underlying Securities Award Underlying Securities Amount Gold sales Gold Sales [Member] Gold Sales Equity Component [Domain] Equity Component [Domain] Document Period End Date Document Period End Date PEO Actually Paid Compensation Amount PEO Actually Paid 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