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Business Combinations (Details Textual) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Feb. 11, 2016
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Dec. 31, 2009
Mar. 31, 2016
Business Acquisition [Line Items]                
Intangible assets, weighted-average useful life       8 years   10 years    
Amortization expense related to intangible assets   $ 11,300,000 $ 3,900,000 $ 20,100,000 $ 7,700,000      
Technology-Based Intangible Assets [Member]                
Business Acquisition [Line Items]                
Intangible assets, weighted-average useful life       8 years   9 years    
Customer-Related Intangible Assets [Member]                
Business Acquisition [Line Items]                
Intangible assets, weighted-average useful life       8 years   8 years    
Ellipse Technologies Inc [Member]                
Business Acquisition [Line Items]                
Business acquisition. date of acquisition       Feb. 11, 2016        
Business acquisition, purchase price $ 380,000,000              
Business acquisition, potential future milestone payment 30,000,000              
Cash payment on purchase of outstanding shares $ 381,579,000              
Contingent liability   19,400,000   $ 19,400,000       $ 18,800,000
Revenue from operation of NSO   15,100,000   21,000,000        
Income (loss) from operation of NSO   (1,100,000)   700,000        
Ellipse Technologies Inc [Member] | Amortization Charges [Member]                
Business Acquisition [Line Items]                
Amortization expense related to intangible assets     6,500,000   13,000,000      
Ellipse Technologies Inc [Member] | Fair Value Adjustment To Inventory [Member]                
Business Acquisition [Line Items]                
Fair value adjustment of acquired inventory   (7,400,000) $ 7,400,000 (12,300,000) 14,700,000      
Ellipse Technologies Inc [Member] | Acquisition Related Costs [Member]                
Business Acquisition [Line Items]                
Acquisition costs related to merger         $ 4,000,000      
Ellipse Technologies Inc [Member] | Selling, Marketing and Administrative Expenses [Member]                
Business Acquisition [Line Items]                
Acquisition costs related to merger       $ 4,000,000        
Ellipse Technologies Inc [Member] | Technology-Based Intangible Assets [Member]                
Business Acquisition [Line Items]                
Intangible assets, weighted-average useful life       7 years        
Ellipse Technologies Inc [Member] | Customer-Related Intangible Assets [Member]                
Business Acquisition [Line Items]                
Intangible assets, weighted-average useful life       9 years        
Ellipse Technologies Inc [Member] | Trade Name Related Intangible Assets [Member]                
Business Acquisition [Line Items]                
Intangible assets, weighted-average useful life       7 years        
Ellipse Technologies Inc [Member] | Traditional Working Capital Adjustments [Member]                
Business Acquisition [Line Items]                
Escrow cash received   600,000            
Progentix Orthobiology [Member]                
Business Acquisition [Line Items]                
Advanced loan accordance to loan agreement   $ 5,300,000   $ 5,300,000        
Accrued interest rate of loan   6.00%   6.00%        
Progentix Orthobiology [Member] | Preferred Stock Purchase Agreement [Member]                
Business Acquisition [Line Items]                
Cash payment on purchase of outstanding shares             $ 10,000,000  
Percentage of ownership Interests acquired             40.00%