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Acquisitions (Net Assets Acquired) (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Jan. 31, 2012
Ostial Solutions, LLC [Member]
Nov. 19, 2012
MediGroup [Member]
Dec. 19, 2012
Thomas Medical Products, Inc [Member]
Jan. 31, 2012
Developed Technology Rights [Member]
Ostial Solutions, LLC [Member]
Nov. 19, 2012
Developed Technology Rights [Member]
MediGroup [Member]
Dec. 19, 2012
Developed Technology Rights [Member]
Thomas Medical Products, Inc [Member]
Jan. 31, 2012
Noncompete Agreements [Member]
Ostial Solutions, LLC [Member]
Nov. 19, 2012
Noncompete Agreements [Member]
MediGroup [Member]
Dec. 19, 2012
Noncompete Agreements [Member]
Thomas Medical Products, Inc [Member]
Jan. 31, 2012
Customer Lists [Member]
Ostial Solutions, LLC [Member]
Nov. 19, 2012
Customer Lists [Member]
MediGroup [Member]
Dec. 19, 2012
Customer Lists [Member]
Thomas Medical Products, Inc [Member]
Jan. 31, 2012
Trademarks [Member]
Ostial Solutions, LLC [Member]
Nov. 19, 2012
Trademarks [Member]
MediGroup [Member]
Dec. 19, 2012
Trademarks [Member]
Thomas Medical Products, Inc [Member]
Business Acquisition [Line Items]                                  
Trade receivables         $ 6,507                        
Inventories       263 5,078                        
Prepaid expenses         340                        
Property and equipment       79 2,685                        
Intangibles           10,500 2,000 43,000 10 210 500 600 110 5,000 110 80 1,400
Goodwill 175,489 175,108 9,580 1,697 102,788                        
Total assets acquired     20,800 4,439 167,298                        
Trade payables         588                        
Accrued expenses         1,094                        
Total liabilities assumed         1,682                        
Net assets acquired, net of cash acquired         165,616                        
Net assets acquired, cash acquired         $ 1,829