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Employee Benefit Plans (Details 8) | 12 Months Ended
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Dec. 31, 2012
Fixed income investments - Cash/money market account |
Investment Category Benchmark | Citigroup Treasury Bill Index - 3 month
Range of acceptable deviation from investment category benchmark, minimum | 0.00%
Range of acceptable deviation from investment category benchmark, maximum | 0.50%
Fixed income investments - US government bond fund |
Investment Category Benchmark | Barclays Intermediate Government Bond Index
Range of acceptable deviation from investment category benchmark, minimum | 0.00%
Range of acceptable deviation from investment category benchmark, maximum | 2.00%
Fixed income investments - US corporate bond fund |
Investment Category Benchmark | Barclays Aggregate Index
Range of acceptable deviation from investment category benchmark, minimum | 0.00%
Range of acceptable deviation from investment category benchmark, maximum | 2.00%
Fixed income investments - US corporate high yield bond fund |
Investment Category Benchmark | Barclays High Yield Index
Range of acceptable deviation from investment category benchmark, minimum | 0.00%
Range of acceptable deviation from investment category benchmark, maximum | 2.00%
Equity investments - Large cap value fund |
Investment Category Benchmark | Russell 1000 Value Index
Range of acceptable deviation from investment category benchmark, minimum | 0.00%
Range of acceptable deviation from investment category benchmark, maximum | 3.00%
Equity investments - Large cap growth fund |
Investment Category Benchmark | Russell 1000 Growth Index
Range of acceptable deviation from investment category benchmark, minimum | 0.00%
Range of acceptable deviation from investment category benchmark, maximum | 3.00%
Equity investments - Mid cap equity fund |
Investment Category Benchmark | Russell Mid Cap Index
Range of acceptable deviation from investment category benchmark, minimum | 0.00%
Range of acceptable deviation from investment category benchmark, maximum | 3.00%
Equity investments - Small cap growth fund |
Investment Category Benchmark | Russell 2000 Growth Index
Range of acceptable deviation from investment category benchmark, minimum | 0.00%
Range of acceptable deviation from investment category benchmark, maximum | 3.00%
Equity investments - Foreign equity fund |
Investment Category Benchmark | MSCI EAFE Index
Range of acceptable deviation from investment category benchmark, minimum | 0.00%
Range of acceptable deviation from investment category benchmark, maximum | 3.00%
Equity investments - Company stock |
Investment Category Benchmark | Russell 2000 Index
Range of acceptable deviation from investment category benchmark, minimum | 0.00%
Range of acceptable deviation from investment category benchmark, maximum | 3.00%

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- Definition The type of investment category benchmark. + References No definition available. + Details
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- Definition The maximum range of acceptable deviation from the investment category benchmark. + References No definition available. + Details
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