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Related Party Transactions - Additional Information (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
HealthpointCapital [Member]
Related Party Transaction [Line Items]
Incurred expenses	$ 0.1
Payable liability	0.1
New York Orthotec matter [Member]
Related Party Transaction [Line Items]
Legal expenses	$ 1.3	$ 1.9

Carrying amount as of the balance sheet date of obligations due all related parties. For classified balance sheets, represents the current portion of such liabilities (due within one year or within the normal operating cycle if longer).

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