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Contingencies (Details Textual) (USD $)
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1 Months Ended | 9 Months Ended | 1 Months Ended | 1 Months Ended | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Nov. 30, 2011
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Sep. 29, 2012
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Dec. 31, 2011
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May 31, 2011
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Mar. 31, 2012
Cybex [Member]
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Dec. 07, 2010
Cybex [Member]
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Sep. 29, 2012
Accrued Liabilities [Member]
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Dec. 31, 2011
Accrued Liabilities [Member]
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Sep. 29, 2012
Other Long-Term Liabilities [Member]
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Dec. 31, 2011
Other Long-Term Liabilities [Member]
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Sep. 29, 2012
Other Assets [Member]
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Dec. 31, 2011
Other Assets [Member]
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Mar. 31, 2012
Plaintiff [Member]
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Jan. 31, 2011
Plaintiff [Member]
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Dec. 07, 2010
Plaintiff [Member]
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Apr. 30, 2011
Barnhard [Member]
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Dec. 31, 2010
Barnhard [Member]
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Sep. 29, 2012
Barnhard [Member]
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Apr. 30, 2011
Co-Defendant Amherst Orthopedic Physical Therapy [Member]
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Dec. 07, 2010
Co-Defendant Amherst Orthopedic Physical Therapy [Member]
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Sep. 29, 2012
Claims Made Prior to December 1, 2008 [Member]
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Sep. 29, 2012
Claims Made on or after December 1, 2008 [Member]
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Sep. 29, 2012
Claims made on or after December 1, 2011 [Member]
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Sep. 29, 2012
Claims made on or after December 1, 2008 and before December 1, 2011 [Member]
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Sep. 29, 2012
Claims between December 1, 2007 and December 1, 2008 [Member]
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| Contingencies (Textual) [Abstract] | |||||||||||||||||||||||||
| Amount of verdict | $ 44,000,000 | $ 18,500,000 | $ 18,500,000 | $ 938,000 | $ 66,000,000 | ||||||||||||||||||||
| Verdict amount percentage | 75.00% | 5.00% | 20.00% | ||||||||||||||||||||||
| Payments for legal settlements | 63,075,000 | ||||||||||||||||||||||||
| Reimbursement percentage | 21.00% | ||||||||||||||||||||||||
| Aggregate collateral amount | 10,000,000 | ||||||||||||||||||||||||
| Litigation Settlement Additional Amount | 1,000,000 | ||||||||||||||||||||||||
| Net present value of the future amounts payable to the plaintiff | 817,000 | 144,000 | 673,000 | ||||||||||||||||||||||
| Annual coverage amount for claims | 5,000,000 | 25,000,000 | 10,000,000 | ||||||||||||||||||||||
| Deductible amount from policies per claim | 250,000 | 100,000 | |||||||||||||||||||||||
| Annual aggregate deductible from policies | 750,000 | 1,000,000 | |||||||||||||||||||||||
| Product Liability Contingency Annual Insurance Coverage | 5,000,000 | ||||||||||||||||||||||||
| Product liability accrual | 1,785,000 | 1,934,000 | 169,000 | 859,000 | 169,000 | 859,000 | |||||||||||||||||||
| Litigation reserve, current | 27,004,000 | ||||||||||||||||||||||||
| Litigation related receivable | $ 7,561,000 | ||||||||||||||||||||||||
| Contingencies (Additional Textual) [Abstract] | |||||||||||||||||||||||||
| Period over additional sum paid to plaintiff | 7 years | ||||||||||||||||||||||||