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Acquisitions (Narrative) (Details) (USD $)
3 Months Ended 9 Months Ended 0 Months Ended 3 Months Ended 9 Months Ended 0 Months Ended 3 Months Ended 0 Months Ended 3 Months Ended 0 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Jan. 30, 2012
Ostial [Member]
Y
Sep. 30, 2011
Ostial [Member]
Sep. 30, 2012
Ostial [Member]
May 31, 2012
Scion [Member]
Jan. 05, 2012
Scion [Member]
Sep. 02, 2011
Ash [Member]
Y
Sep. 30, 2012
Distribution Rights [Member]
Scion [Member]
Y
Jan. 05, 2012
Distribution Rights [Member]
Scion [Member]
Jan. 30, 2012
Customer Lists [Member]
Ostial [Member]
Y
Sep. 30, 2012
Customer Lists [Member]
Scion [Member]
Y
Sep. 02, 2011
Customer Lists [Member]
Ash [Member]
Y
Jan. 30, 2012
Noncompete Agreements [Member]
Ostial [Member]
Y
Jan. 30, 2012
Developed Technology Rights [Member]
Ostial [Member]
Y
Sep. 02, 2011
Developed Technology Rights [Member]
Ash [Member]
Y
Aug. 27, 2012
Trademarks [Member]
Ostial [Member]
Business Acquisition [Line Items]                                      
Revenues $ 95,907,000 $ 90,477,000 $ 292,057,000 $ 268,357,000   $ 128,000 $ 345,000                        
Business Acquisition, Cost of Acquired Entity, Purchase Price                 2,500,000                    
Business Acquisition, Cost of Acquired Entity, Cash Paid         10,000,000       1,500,000 5,000,000                  
Business Acquisition, Contingent Consideration, Potential Cash Payment 1,000,000   1,000,000   6,500,000     1,000,000   1,000,000                  
Maximum Additional Amount Possibly Due Based On Future Related Product Sales             13,500,000                        
Business Acquisition, Purchase Price Allocation, Liabilities Assumed         5,000,000         1,600,000                  
Business Acquisition, Purchase Price Allocation, Assets Acquired         21,500,000         6,550,000                  
Finite-Lived Intangible Assets, Useful Life                     12   8 5 2 5 15 15 15
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life         14.7         14                  
Acquired Finite-lived Intangible Asset, Amount                       2,500,000 700,000 95,000 300,000 20,000 16,200,000 3,200,000  
Research and Development Asset Acquired Other than Through Business Combination, Written-off 275,000   2,450,000                                
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability     $ (370,000) $ 0