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Goodwill and Other Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011
Goodwill and indefinite life intangible assets: |  |
Goodwill | $ 112,446 | $ 112,446
Trademarks and trade names | 24,599 | 24,599
Total goodwill and trademarks and trade names | 137,045 | 137,045
Finite life intangible assets [Abstract] |  |
Gross carrying amount | 149,780 | 140,633
Accumulated amortization | 81,861 | 81,899
Weighted Average | 15 |
Scanner technology [Member] |  |
Finite life intangible assets [Abstract] |  |
Gross carrying amount | 46,482 | 46,482
Accumulated amortization | 24,490 | 21,457
Weighted Average | 18 |
Developed technology [Member] |  |
Finite life intangible assets [Abstract] |  |
Gross carrying amount | 22,500 | 22,500
Accumulated amortization | 15,085 | 14,261
Weighted Average | 20 |
Distribution network [Member] |  |
Finite life intangible assets [Abstract] |  |
Gross carrying amount | 11,598 | 11,598
Accumulated amortization | 9,591 | 9,089
Weighted Average | 15 |
Trademarks [Member] |  |
Finite life intangible assets [Abstract] |  |
Gross carrying amount | 13,784 | 13,401
Accumulated amortization | 10,925 | 10,214
Weighted Average | 15 |
Other finite life intangible assets [Member] |  |
Finite life intangible assets [Abstract] |  |
Gross carrying amount | 55,416 | 46,652
Accumulated amortization | $ 21,770 | $ 26,878
Weighted Average | 8 |

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