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Contingencies Level 4 (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Operating Leased Assets [Line Items] |  |  |
Loss Contingency Accrual, at Carrying Value | $ 17,500,000 |  |
Operating Leases, Rent Expense | 2,000,000 | 1,900,000 | 1,900,000
Operating Leases, Future Minimum Payments Due, Current | 1,493,000 |  |
Operating Leases, Future Minimum Payments, Due in Two Years | 1,487,000 |  |
Operating Leases, Future Minimum Payments, Due in Three Years | 1,469,000 |  |
Operating Leases, Future Minimum Payments, Due in Four Years | 1,377,000 |  |
Operating Leases, Future Minimum Payments, Due in Five Years | 1,138,000 |  |
Operating Leases, Future Minimum Payments, Due Thereafter | 4,329,000 |  |
Operating Leases, Future Minimum Payments Due | $ 11,300,000 |  |

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