2103100 - Disclosure - Accumulated Other Comprehensive Loss:
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2403402 - Disclosure - Accumulated Other Comprehensive Loss: (Details)
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2303301 - Disclosure - Accumulated Other Comprehensive Loss: (Tables)
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2101100 - Disclosure - Basis of Presentation:
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2401402 - Disclosure - Basis of Presentation: (Details)
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2201201 - Disclosure - Basis of Presentation: (Policies)
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1001000 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED)
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1001501 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical)
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1005000 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)
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1003000 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED)
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1002000 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED)
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0001000 - Document - Document and Entity Information
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2104100 - Disclosure - Income Taxes:
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2404401 - Disclosure - Income Taxes: (Details)
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2102100 - Disclosure - Operating Group Information:
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2402402 - Disclosure - Operating Group Information: (Details)
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2302301 - Disclosure - Operating Group Information: (Tables)
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