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Business Changes And Developments (Purchase Price Allocation) (Details)
In Thousands, unless otherwise specified
Dec. 31, 2011
USD ($)
Aug. 19, 2011
USD ($)
Dec. 31, 2010
USD ($)
Aug. 19, 2011
Lexicon [Member]
USD ($)
Aug. 19, 2011
Lexicon [Member]
GBP (£)
Dec. 31, 2010
AS [Member]
USD ($)
May 31, 2010
AS [Member]
USD ($)
May 28, 2010
AS [Member]
USD ($)
Cash Paid   $ 52,160   $ 52,160 £ 31,598   $ 68,992 $ 68,992
Fair Value of Shares Issued       636        
Fair Value of Contingent Consideration               14,037
Fair Value of Consideration Transferred               83,029
Fair Value of Noncontrolling Interest               42,381
Fair Value of Deferred Cash Consideration       9,274   1,470    
Total Fair Value of Purchase Price       62,070       125,410
Cash and Cash Equivalents       21,812       1,410
Accounts Receivable 7,821     7,821       7,034
Investments               9
Prepaid Expenses       9,504       321
Fixed Assets       429       114
Other Assets       964        
Intangible Assets       7,164       43,280
Accounts Payable and Accrued Expenses               (668)
Accrued Compensation and Benefits               (6,278)
Current Liabilities       (21,592)        
Long-term Debt       (8,318)        
Income Taxes Payable               (21)
Identifiable Net Assets       17,784       45,201
Goodwill Resulting from Business Combination $ 44,366   $ 88,230 $ 44,286       $ 80,209