Annual report pursuant to Section 13 and 15(d)

INVESTMENT IN AL MASANE AL KOBRA MINING COMPANY (AMAK) (Details)

v2.4.1.9
INVESTMENT IN AL MASANE AL KOBRA MINING COMPANY (AMAK) (Details)
12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Dec. 31, 2012
USD ($)
Dec. 31, 2014
SAR
May 31, 2013
AMAK [Member]
USD ($)
Jul. 31, 2011
AMAK [Member]
Member
Dec. 31, 2014
AMAK [Member]
USD ($)
Dec. 31, 2013
AMAK [Member]
USD ($)
Dec. 31, 2012
AMAK [Member]
USD ($)
Dec. 31, 2014
AMAK [Member]
SAR
Dec. 31, 2013
AMAK [Member]
SAR
Jul. 31, 2011
AMAK [Member]
Saudi Investors [Member]
Jul. 31, 2011
AMAK [Member]
ARMICO [Member]
USD ($)
Investment in Al Masane Al Kobra Mining Company Amak [Line Items]                          
Investment in AMAK             $ 53,000,000us-gaap_EquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
$ 54,100,000us-gaap_EquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
         
Cash contributed by other investors to AMAK                         37,300,000trec_CashContributedByOtherInvestorsToJointVenture
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= trec_ArmicoMember
Exchange rate       3.75us-gaap_ForeignCurrencyExchangeRateTranslation1           3.75us-gaap_ForeignCurrencyExchangeRateTranslation1
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
     
Percentage interest acquire by other investors in AMAK (in hundredths)               10.00%trec_PercentageInterestAcquireByOtherInvestorsInJointVenture
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
      53.00%trec_PercentageInterestAcquireByOtherInvestorsInJointVenture
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= trec_SaudiInvestorsMember
10.00%trec_PercentageInterestAcquireByOtherInvestorsInJointVenture
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= trec_ArmicoMember
Shares purchased under equity method investments (in shares)               937,500trec_SharesPurchasedUnderEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
         
Share price (in dollars per share)               $ 8.00us-gaap_SharePrice
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
    30us-gaap_SharePrice
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
   
Payments to acquire equity method investments               7,500,000us-gaap_PaymentsToAcquireEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
         
Number of board members can be appointed by entity           4trec_NumberOfBoardMembersCanBeAppointedByEntity
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
             
Maximum number of board members as per by laws           9trec_MaximumNumberOfBoardMembersAsPerByLaws
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
             
Gain upon formation of AMAK             16,200,000trec_EquityMethodInvestmentGainUponFormation
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
           
Percentage investment in AMAK (in hundredths)           37.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
  35.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
         
Number of shares acquired in joint venture by other investors (in shares)                         5,000,000trec_NumberOfSharesAcquiredInJointVentureByOtherInvestors
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= trec_ArmicoMember
Results of Operations [Abstract]                          
Sales             63,300,000us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
104,990,000us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
15,594,000us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
       
Gross Profit             3,624,000us-gaap_EquityMethodInvestmentSummarizedFinancialInformationGrossProfitLoss
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
21,881,000us-gaap_EquityMethodInvestmentSummarizedFinancialInformationGrossProfitLoss
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
3,825,000us-gaap_EquityMethodInvestmentSummarizedFinancialInformationGrossProfitLoss
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
       
General, administrative and other expenses             10,487,000trec_EquityMethodInvestmentSummarizedFinancialInformationGeneralAdministrativeAndOtherExpenses
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
12,360,000trec_EquityMethodInvestmentSummarizedFinancialInformationGeneralAdministrativeAndOtherExpenses
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
6,328,000trec_EquityMethodInvestmentSummarizedFinancialInformationGeneralAdministrativeAndOtherExpenses
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
       
Net Income (loss)             (6,863,000)us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
9,521,000us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
(2,503,000)us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
       
Depreciation and amortization expense             23,700,000us-gaap_DepreciationAndAmortization
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
24,400,000us-gaap_DepreciationAndAmortization
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
9,600,000us-gaap_DepreciationAndAmortization
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
       
Net income before depreciation and amortization             16,845,000trec_NetIncomeBeforeDepreciationAndAmortization
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
33,878,000trec_NetIncomeBeforeDepreciationAndAmortization
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
7,144,000trec_NetIncomeBeforeDepreciationAndAmortization
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
       
Financial Position [Abstract]                          
Current assets             17,782,000us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
32,923,000us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
         
Noncurrent assets             265,584,000us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
264,997,000us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
         
Total assets             283,366,000us-gaap_EquityMethodInvestmentSummarizedFinancialInformationAssets
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
297,920,000us-gaap_EquityMethodInvestmentSummarizedFinancialInformationAssets
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
         
Current liabilities             23,034,000us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
22,497,000us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
         
Long term liabilities             67,598,000us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNoncurrentLiabilities
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
75,826,000us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNoncurrentLiabilities
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
         
Shareholders' equity             192,734,000us-gaap_EquityMethodInvestmentSummarizedFinancialInformationEquity
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
199,597,000us-gaap_EquityMethodInvestmentSummarizedFinancialInformationEquity
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
         
Total liabilities and equity             283,366,000us-gaap_EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesAndEquity
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
297,920,000us-gaap_EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesAndEquity
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
         
Equity in Income or Loss of AMAK Reflected on Consolidated Statement Of Operation [Abstract]                          
Company's share of earnings (loss) reported by AMAK (2,419,000)trec_ReportedIncomeLossFromEquityMethodInvestments 3,356,000trec_ReportedIncomeLossFromEquityMethodInvestments (885,000)trec_ReportedIncomeLossFromEquityMethodInvestments                    
Amortization of difference between Company's investment in and Company's share of net assets of AMAKAMAK 1,347,000us-gaap_InvestmentIncomeNetAmortizationOfDiscountAndPremium 1,347,000us-gaap_InvestmentIncomeNetAmortizationOfDiscountAndPremium 674,000us-gaap_InvestmentIncomeNetAmortizationOfDiscountAndPremium                    
Equity in earnings (loss) of AMAK (1,072,000)trec_IncomeLossAndGainFromEquityIssuanceFromEquityMethodInvestments 4,703,000trec_IncomeLossAndGainFromEquityIssuanceFromEquityMethodInvestments (211,000)trec_IncomeLossAndGainFromEquityIssuanceFromEquityMethodInvestments                    
Increase in the entity's share in net assets of AMAK             4,000,000trec_IncreaseInEntitySShareInNetAssetsOfAmak
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
  8,900,000trec_IncreaseInEntitySShareInNetAssetsOfAmak
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
       
Advances to AMAK 0us-gaap_AdvancesToAffiliate 536,000us-gaap_AdvancesToAffiliate         0us-gaap_AdvancesToAffiliate
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
536,000us-gaap_AdvancesToAffiliate
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
         
Proceeds from advances to AMAK         2,016,000us-gaap_ProceedsFromCollectionOfAdvanceToAffiliate
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
               
Additional advances to AMAK               $ 2,041,000trec_AdditionalAdvancesToAffiliate
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember