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Acquisitions (Details Textual) (USD $)
 3 Months Ended 6 Months Ended 12 Months Ended 6 Months Ended 12 Months Ended 6 Months Ended 12 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended
Nov. 30, 2012
Nov. 30, 2012
May 22, 2012
May 31, 2012
Mar. 22, 2012
May 22, 2012
Trademark-NAMIC [Member]
May 22, 2012
Biomedical Polymer Additive [Member]
May 22, 2012
Power Injectable Port [Member]
Nov. 30, 2012
Customer relationships [Member]
May 31, 2012
Customer relationships [Member]
May 22, 2012
Customer relationships [Member]
Nov. 30, 2012
Trademarks [Member]
May 31, 2012
Trademarks [Member]
May 22, 2012
Trademarks [Member]
May 22, 2012
In-process R&D [Member]
Nov. 30, 2012
Technology [Member]
May 22, 2012
Technology [Member]
Nov. 30, 2012
Navilyst [Member]
May 22, 2012
Navilyst [Member]
Nov. 30, 2012
Avista Capital Partners [Member]
Nov. 30, 2012
Vortex Medical [Member]
Acquisitions (Textual) [Abstract]                                          
Issuance of common stock                                       9,500,000  
Drawn acquisition debt financing                                     $ 150,000,000    
Cash paid for acquisition 15,105,000,000 15,105,000,000                                 97,000,000   15,105,000
Transaction and Severance costs related to Acquisition 1,700,000 3,900,000                                      
Closing price of stock                                     $ 12.44    
Total purchase price                                     361,000,000   75,407,000
Common stock, outstanding shares, percentage                                       27.00%  
Intangible assets other than goodwill     107,100,000                     32,500,000         107,100,000   72,430,000
Acquired finite lived intangible assets                     49,400,000     3,900,000     10,100,000        
Weighted average useful life                 15 years     7 years       6 years          
Acquired intangible asset           28,600,000 12,100,000 3,000,000             15,100,000            
Guaranteed minimum payments payable first anniversary                                         8,350,000
Guaranteed minimum payments payable second anniversary                                         8,000,000
Guaranteed minimum payments payable third anniversary                                         8,000,000
Guaranteed minimum payments payable fourth anniversary                                         8,000,000
Guaranteed minimum payments payable fifth anniversary                                         7,650,000
Percentage of annual net sales, first limit                                         10.00%
Annual net sales, first limit                                         150,000,000
Percentage of annual net sales, second limit                                         12.50%
Annual net sales, second limit                                         150,000,000
Annual net sales                                         500,000,000
Percentage of annual net sales, third limit                                         15.00%
Annual net sales, third limit                                         500,000,000
Weighted average useful life                 14 years 9 months 18 days 11 years 8 months 12 days   9 years 10 months 24 days 7 years 3 months 18 days         10 years     15 years
Increase in estimated purchase consideration     145,221,000                               145,221,000   30,019,000
Acquisition related costs                                         325,000
Purchase consideration placed in escrow     19,100,000                                    
Purchase consideration placed in escrow in cash     14,000,000                                    
Purchase consideration placed in escrow as common stock     415,000                                    
Escrow receivable 2,500,000 2,500,000   2,500,000                                  
Investment in company         5,000,000                                
Ownership percentage in investment         14.30%                                
Adjustment to purchase price period     1 year                                    
Present value of contingent consideration liability                                         $ 60,302,000