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RELATED PARTY TRANSACTIONS: (Details) |  |  | 9 Months Ended |  | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |  | 9 Months Ended |  | 9 Months Ended |  | 9 Months Ended |  | 9 Months Ended |  | 9 Months Ended |  | 9 Months Ended |  | 9 Months Ended |  | 9 Months Ended |  | 9 Months Ended |  | 9 Months Ended
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Sep. 30, 2014 USD ($) | Dec. 31, 2013 USD ($) | Sep. 30, 2014 Grupo Mexico S.A. de C.V. USD ($) | Sep. 30, 2013 Grupo Mexico S.A. de C.V. USD ($) | Dec. 31, 2013 Grupo Mexico S.A. de C.V. USD ($) | May 31, 2010 Mexico Generadora de Energia S. de R.L. ("MGE") USD ($) | Mar. 31, 2012 Mexico Generadora de Energia S. de R.L. ("MGE") USD ($) | Sep. 30, 2014 Mexico Generadora de Energia S. de R.L. ("MGE") USD ($) | Sep. 30, 2013 Mexico Generadora de Energia S. de R.L. ("MGE") USD ($) | Dec. 31, 2012 Mexico Generadora de Energia S. de R.L. ("MGE") USD ($) | Dec. 31, 2005 Mexico Generadora de Energia S. de R.L. ("MGE") item | Dec. 31, 2013 Mexico Generadora de Energia S. de R.L. ("MGE") USD ($) | Mar. 31, 2012 Mexico Generadora de Energia S. de R.L. ("MGE") Controladora de Infraestructura Energetica Mexico, S. A. de C. V. USD ($) | Mar. 31, 2012 Mexico Generadora de Energia S. de R.L. ("MGE") Controladora de Infraestructura Energetica Mexico, S. A. de C. V. MXN | Mar. 31, 2012 Mexico Generadora de Energia S. de R.L. ("MGE") Minera Mexico Maximum | Sep. 30, 2014 Compania Perforadora Mexico S.A.P.I. de C.V. and affiliates USD ($) | Sep. 30, 2013 Compania Perforadora Mexico S.A.P.I. de C.V. and affiliates USD ($) | Dec. 31, 2013 Compania Perforadora Mexico S.A.P.I. de C.V. and affiliates USD ($) | Sep. 30, 2014 Equity investment in affiliate USD ($) | Sep. 30, 2013 Equity investment in affiliate USD ($) | Dec. 31, 2013 Equity investment in affiliate USD ($) | Sep. 30, 2014 Mexico Proyectos y Desarrollos, S.A. de C.V. and affiliates USD ($) | Sep. 30, 2013 Mexico Proyectos y Desarrollos, S.A. de C.V. and affiliates USD ($) | Dec. 31, 2013 Mexico Proyectos y Desarrollos, S.A. de C.V. and affiliates USD ($) | Sep. 30, 2014 Asarco LLC ("Asarco") USD ($) | Sep. 30, 2013 Asarco LLC ("Asarco") USD ($) | Dec. 31, 2013 Asarco LLC ("Asarco") USD ($) | Sep. 30, 2014 Higher Technology S.A.C. USD ($) | Sep. 30, 2013 Higher Technology S.A.C. USD ($) | Dec. 31, 2013 Higher Technology S.A.C. USD ($) | Sep. 30, 2014 Breaker, S.A. de C.V and affiliates ("Breaker") USD ($) | Sep. 30, 2013 Breaker, S.A. de C.V and affiliates ("Breaker") USD ($) | Dec. 31, 2013 Breaker, S.A. de C.V and affiliates ("Breaker") USD ($) | Sep. 30, 2014 Sempertrans and affiliates USD ($) | Sep. 30, 2013 Sempertrans and affiliates USD ($) | Dec. 31, 2013 Sempertrans and affiliates USD ($) | Sep. 30, 2014 Mexico Transportes Aereos S.A. de C.V. ("Mextransport") USD ($) | Sep. 30, 2013 Mexico Transportes Aereos S.A. de C.V. ("Mextransport") USD ($) | Dec. 31, 2013 Mexico Transportes Aereos S.A. de C.V. ("Mextransport") USD ($) | Sep. 30, 2014 Pigoba S.A. de C.V. USD ($) | Sep. 30, 2013 Pigoba S.A. de C.V. USD ($) | Sep. 30, 2014 Ferrocarril Mexicano, S.A. de C.V. USD ($) | Sep. 30, 2013 Ferrocarril Mexicano, S.A. de C.V. USD ($) | Dec. 31, 2013 Ferrocarril Mexicano, S.A. de C.V. USD ($) | Sep. 30, 2014 Servicios y Fabricaciones Mecanicas S.A.C. USD ($) | Sep. 30, 2013 Servicios y Fabricaciones Mecanicas S.A.C. USD ($) | Sep. 30, 2014 Companies with relationship with SCC executive officers' families USD ($) | Sep. 30, 2013 Companies with relationship with SCC executive officers' families USD ($) | Sep. 30, 2014 Grupo Mexico and affiliates USD ($) | Sep. 30, 2013 Grupo Mexico and affiliates USD ($)
Related party transactions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related parties receivables current: | $ 28,400,000 | $ 38,062,000 | $ 800,000 |  | $ 800,000 |  |  | $ 26,400,000 |  |  |  | $ 18,800,000 |  |  |  | $ 1,200,000 |  | $ 700,000 |  |  | $ 17,200,000 |  |  | $ 600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related parties receivable, non-current: | 161,244,000 | 161,244,000 |  |  |  |  |  | 161,200,000 |  | 184,000,000 |  | 161,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related parties payables: | 65,519,000 | 28,373,000 | 800,000 |  | 3,300,000 |  |  | 39,900,000 |  |  |  | 14,400,000 |  |  |  |  |  |  |  |  |  | 700,000 |  |  | 18,400,000 |  | 6,200,000 | 100,000 |  | 100,000 | 600,000 |  | 300,000 | 100,000 |  | 100,000 | 1,000,000 |  | 600,000 | 100,000 |  | 3,800,000 |  | 3,300,000 |  |  |  |  |  |
Total purchases from related parties |  |  | 10,400,000 | 10,400,000 |  |  |  | 137,200,000 |  |  |  |  |  |  |  | 2,600,000 | 4,100,000 |  |  |  |  | 76,800,000 | 36,500,000 |  | 39,500,000 | 82,000,000 |  | 2,100,000 | 1,700,000 |  | 5,700,000 | 2,700,000 |  | 900,000 | 1,000,000 |  | 2,100,000 | 2,000,000 |  | 400,000 | 100,000 | 17,300,000 | 14,900,000 |  | 1,100,000 | 200,000 | 10,200,000 | 5,700,000 | 283,800,000 | 147,900,000
Sales revenues from related parties |  |  |  |  |  |  |  | 75,500,000 | 11,600,000 |  |  |  |  |  |  | 400,000 | 400,000 |  |  |  |  | 600,000 | 600,000 |  | 22,100,000 | 71,800,000 |  |  |  |  |  |  |  |  |  |  | 200,000 | 200,000 |  |  |  |  |  |  |  |  |  |  | 98,600,000 | 84,400,000
Number of power plants |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum amount of line of credit granted to related party |  |  |  |  |  | 350,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) |  |  |  |  |  | 4.40% |  |  |  | 5.75% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of interest acquired |  |  |  |  |  |  |  |  |  |  |  |  | 99.999% | 99.999% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Value of interest acquired |  |  |  |  |  |  |  |  |  |  |  |  | 150,000,000 | 1,928,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.001% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loan repaid |  |  |  |  |  |  | 150,000,000 |  |  |  |  |  |  |  |  |  |  |  |  | 18,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest earned |  |  |  |  |  |  |  | 7,000,000 | 7,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 44.20% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loan granted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 56,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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