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Fair Value Of Assets And Liabilities (Changes In Estimated Fair Values Of Assets And Liabilities Measured Using Significant Unobservable Inputs) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Fair Value, Assets And Liabilities Measured On Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Change in fair value of contingent consideration-included in SG&A, liabilities   $ 9,300
Level 3 [Member]
   
Fair Value, Assets And Liabilities Measured On Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Beginning balance, assets 0 58,650
Beginning balance, liabilities 0 6,070
Unrealized gain - trading securities included in earnings, assets   4,435
Unrealized gain - trading securities included in earnings, liabilities   0
Unrealized loss - UBS Put Option included in earnings, assets   (4,435)
Unrealized loss - UBS Put Option included in earnings, liabilities   0
Redemptions at par, assets   (58,650)
Redemptions at par, liabilities   0
Acquisition-related contingent consideration recorded, assets 0 0
Acquisition-related contingent consideration recorded, liabilities 21,595 4,195
Change in fair value of contingent consideration-included in SG&A, asset   0
Change in fair value of contingent consideration-included in SG&A, liabilities   (9,265)
Payments under contingent consideration arrangements, assets   0
Payments under contingent consideration arrangements, liabilities   (1,000)
Ending balance, assets 0 0
Ending balance, liabilities $ 21,595 $ 0