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Acquisition Of On-X Life Technologies (Preliminary Purchase Price Allocation) (Details) - USD ($)
$ in Thousands
Sep. 30, 2016
Jan. 20, 2016
Dec. 31, 2015
Business Acquisition [Line Items]      
Goodwill $ 76,474   $ 11,365
On-X Agreement [Member]      
Business Acquisition [Line Items]      
Cash and cash equivalents   $ 2,472  
Receivables   6,371  
Inventories   13,039  
Intangible assets   53,950  
Goodwill   66,409  
Other assets   6,416  
Liabilities assumed   (20,440)  
Total purchase price   $ 128,217