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entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.No authoritative reference available.falsefalsePercentage of operating revenue contributed by major customers9false0us-gaap_ConcentrationRiskBenchmarkDescriptionus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalse17falsefalsefalse00falsefalsefalsetruefalse18falsefalsefalse00falsefalsefalsetruefalse19falsefalsefalse00Consolidated operating revenuesConsolidated operating revenuesfalsefalsefalsetruefalse20falsefalsefalse00Consolidated operating revenuesConsolidated operating revenuesfalsefalsefalsetruefalse21falsefalsefalse00Consolidated operating revenuesConsolidated operating revenuesfalsefalsefalsetruefalseOtherxbrli:stringItemTypestringIdentifies or describes the benchmark that serves as the denominator in the calculation of the percentage of concentration risk.No authoritative reference available.falsefalseConcentration Risk Benchmark Description10false0us-gaap_ConcentrationRiskAdditionalCharacteristicus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalse17falsefalsefalse00falsefalsefalsetruefalse18falsefalsefalse00falsefalsefalsetruefalse19falsefalsefalse00Three customers combined for approximately 50 percent of consolidated operating revenues. No other customer accounted for more than 10 percent of consolidated operating revenues.Three customers combined for approximately 50 percent of consolidated operating revenues. No other customer accounted for more than 10 percent offalsefalsefalsetruefalse20falsefalsefalse00Two customers accounted for approximately 35 percent of consolidated operating revenues. No other customer accounted for more than 10 percent of consolidated operating revenues.Two customers accounted for approximately 35 percent of consolidated operating revenues. No other customer accounted for more than 10 percent offalsefalsefalsetruefalse21falsefalsefalse00One customer accounted for approximately 20 percentage of our revenues. No other customer accounted for more than 10 percent of consolidated operating revenues.One customer accounted for approximately 20 percentage of our revenues. No other customer accounted for more than 10 percent of consolidated operatingfalsefalsefalsetruefalseOtherxbrli:stringItemTypestringFor an entity that discloses a concentration risk as a percentage of some financial balance or benchmark, identifies a second characteristic of the concentration. For example, "Europe" is the second characteristic in the phrase: "net assets in Europe are 70% of total net assets."No authoritative reference available.falsefalseConcentration Risk Additional Characteristic219Financial Instruments and Credit Risk (Details) (USD $)ThousandsUnKnownUnKnownUnKnowntruetrue