2.4.0.82123100 - Disclosure - Concentration of Credit Risktruefalsefalse1false falsefalseD2013Q2YTDhttp://www.sec.gov/CIK0001415020duration2013-01-01T00:00:002013-06-30T00:00:001true 1us-gaap_RisksAndUncertaintiesAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Risks and Uncertainties [Abstract]2false 2us-gaap_ConcentrationRiskDisclosureTextBlockus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:10px;padding-top:10px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Concentration of Credit Risk</font></div><div style="line-height:120%;padding-bottom:10px;padding-top:10px;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">TCM is exposed to counterparty risk from its cash and cash equivalent balances and its reclamation deposits held by financial institutions and governmental entities. TCM monitors its positions with, and the credit quality of, the financial institutions and companies in which it invests its cash and cash equivalents and that hold its reclamation deposits. Counterparties to cash balances and its reclamation deposits, other than balances maintained in various bank operating accounts, are US and Canadian institutions and the US and Canadian governments.</font></div><div style="line-height:120%;padding-bottom:10px;padding-top:10px;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">TCM manages its credit risk from its accounts receivable through its collection activities. As of </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">June&#160;30, 2013</font><font style="font-family:inherit;font-size:10pt;">, TCM had </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">five</font><font style="font-family:inherit;font-size:10pt;"> customers who owed TCM more than </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">$3.0 million</font><font style="font-family:inherit;font-size:10pt;"> and accounted for approximately </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">41.9%</font><font style="font-family:inherit;font-size:10pt;"> of total accounts and other receivables outstanding. Another </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">eight</font><font style="font-family:inherit;font-size:10pt;"> customers had balances greater than </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">$1.0 million</font><font style="font-family:inherit;font-size:10pt;"> but less than </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">$3.0 million</font><font style="font-family:inherit;font-size:10pt;"> that accounted for approximately </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">17.0%</font><font style="font-family:inherit;font-size:10pt;"> of total accounts and other receivables. All of these customers were compliant with credit terms and scheduled payment dates.</font></div><div style="line-height:120%;padding-bottom:10px;padding-top:10px;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">TCM's maximum counterparty and credit risk exposure is the carrying value of its cash and cash equivalents and accounts receivable. The carrying amounts of accounts receivable, accounts payable, accrued liabilities and fixed-rate debt, excluding the 2017 Notes, 2018 Notes, 2019 Notes and tMEDS, as discussed in Notes&#160;8 and 10, approximated fair value as of </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">June&#160;30, 2013</font><font style="font-family:inherit;font-size:10pt;">.</font></div></div>falsefalsefalsenonnum:textBlockItemTypenaThe entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6327-108592 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13531-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13537-108611 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6442-108592 false0Concentration of Credit RiskfalseConcentration of Credit RiskUnKnownUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.thompsoncreekmetals.com/role/ConcentrationOfCreditRisk12