Fair Value Measurements Assets Measured on a Non-Recurring Basis (Details) (Fair Value, Inputs, Level 3 [Member], USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
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Jun. 30, 2013
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Jun. 30, 2012
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Jun. 30, 2013
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Jun. 30, 2012
|
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Fair Value, Inputs, Level 3 [Member]
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Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] | ||||
Adjusted basis of inventory | $ 1,583 | $ 607 | $ 1,901 | $ 607 |
Impairments | 1,201 | 472 | 2,101 | 567 |
Initial Basis of inventory | $ 2,784 | $ 1,079 | $ 4,002 | $ 1,174 |