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Operations and Significant Accounting Policies (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Goodwill and Intangible Asset Impairment [Abstract] |  |  |
Goodwill | $ 260,651 | $ 256,232 | $ 248,428
Other intangible assets, net | $ 308,171 | 316,440 |
Acquired Intangible Assets [Abstract] |  |  |
Weighted average amortization period (in years) | 27 years |  |
Revenue Recognition [Abstract] |  |  |
Net Commission Service Fee Revenue | 50.00% |  |
Shipping and handling costs | $ 12,600 | 13,600 | $ 12,600
Allowance for doubtful accounts | $ 1,336 | $ 1,239 |
Linvatec Corporation [Member] |  |  |
Acquired Intangible Assets [Abstract] |  |  |
Number of years of historical revenue attrition used to evaluate acquired finite-lived intangible assets useful life | 5 years |  |
Annual attrition rate used to evaluate acquired finite-lived intangible assets useful life | 2.60% |  |
Customer Relationships [Member] |  |  |
Acquired Intangible Assets [Abstract] |  |  |
Weighted average amortization period (in years) | 33 years |  |
Customer Relationships [Member] | Linvatec Corporation [Member] |  |  |
Acquired Intangible Assets [Abstract] |  |  |
Weighted average amortization period (in years) | 38 years |  |
Customer Relationships [Member] | Other Acquisitions Excluding Linvatec Corporation[Member] |  |  |
Acquired Intangible Assets [Abstract] |  |  |
Weighted average amortization period (in years) | 18 years |  |
Promotional, Marketing and Distribution Rights [Member] |  |  |
Acquired Intangible Assets [Abstract] |  |  |
Weighted average amortization period (in years) | 25 years |  |

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