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Commitments and Contingencies Health Benefit Plan Costs (Details) (Health Plan Benefit Costs [Member], USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
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Sep. 30, 2014
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Sep. 30, 2013
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Sep. 30, 2014
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Sep. 30, 2013
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Health Plan Benefit Costs [Member]
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| Plan costs | $ 5,694 | $ 6,141 | $ 16,670 | $ 16,641 |