101 - Document - Document And Entity Information link:presentationLink link:definitionLink link:calculationLink 102 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS link:presentationLink link:definitionLink link:calculationLink 103 - Statement - CONDESNED CONSOLIDATED BALANCE SHEETS [Parenthetical] link:presentationLink link:definitionLink link:calculationLink 104 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF INCOME link:presentationLink link:definitionLink link:calculationLink 105 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) link:presentationLink link:definitionLink link:calculationLink 106 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:definitionLink link:calculationLink 107 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) link:presentationLink link:definitionLink link:calculationLink 108 - Disclosure - Principal activity link:presentationLink link:definitionLink link:calculationLink 109 - Disclosure - Accounting policies link:presentationLink link:definitionLink link:calculationLink 110 - Disclosure - Fair value measurements link:presentationLink link:definitionLink link:calculationLink 111 - Disclosure - Segment information link:presentationLink link:definitionLink link:calculationLink 112 - Disclosure - Earnings per share link:presentationLink link:definitionLink link:calculationLink 113 - Disclosure - Investment in OC-BVI link:presentationLink link:definitionLink link:calculationLink 114 - Disclosure - N.S.C. Agua, S.A. de C.V. link:presentationLink link:definitionLink link:calculationLink 115 - Disclosure - Contingencies link:presentationLink link:definitionLink link:calculationLink 116 - Disclosure - Impact of recent accounting pronouncements link:presentationLink link:definitionLink link:calculationLink 117 - Disclosure - Subsequent events link:presentationLink link:definitionLink link:calculationLink 118 - Disclosure - Accounting policies (Policies) link:presentationLink link:definitionLink link:calculationLink 119 - Disclosure - Fair value measurements (Tables) link:presentationLink link:definitionLink link:calculationLink 120 - Disclosure - Segment information (Tables) link:presentationLink link:definitionLink link:calculationLink 121 - Disclosure - Earnings per share (Tables) link:presentationLink link:definitionLink link:calculationLink 122 - Disclosure - Investment in OC-BVI (Tables) link:presentationLink link:definitionLink link:calculationLink 123 - Disclosure - Accounting policies (Details Textual) link:presentationLink link:definitionLink link:calculationLink 124 - Disclosure - Fair value measurements (Details) link:presentationLink link:definitionLink link:calculationLink 125 - Disclosure - Fair value measurements (Details 1) link:presentationLink link:definitionLink link:calculationLink 126 - Disclosure - Segment information (Details) link:presentationLink link:definitionLink link:calculationLink 127 - Disclosure - Segment information (Details Textual) link:presentationLink link:definitionLink link:calculationLink 128 - Disclosure - Earnings per share (Details) link:presentationLink link:definitionLink link:calculationLink 129 - Disclosure - Investment in OC-BVI (Details) link:presentationLink link:definitionLink link:calculationLink 130 - Disclosure - Investment in OC-BVI (Details 1) link:presentationLink link:definitionLink link:calculationLink 131 - Disclosure - Investment in OC-BVI (Details Textual) link:presentationLink link:definitionLink link:calculationLink 132 - Disclosure - N.S.C. Agua, S.A. de C.V. (Details Textual) link:presentationLink link:definitionLink link:calculationLink 133 - Disclosure - Contingencies (Details Textual) link:presentationLink link:definitionLink link:calculationLink