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Accrued and Other Liabilities (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Accrued Liabilities, Current [Abstract]    
Accrued expenses $ 62,567 $ 82,342
Payroll and related accruals 49,563 44,421
Deferred revenue 27,296 23,793
Accrued royalties 17,600 25,659
Fair value of derivative instruments 12,911 2,492
Accrued earn-outs and milestone payments 9,806 17,470
Accrued interest on long-term debt 7,008 7,383
Preacquisition contingencies assumed in acquisition 5,493 6,203
Current portion of capital lease obligations 4,203 4,006
Total accrued and other liabilities $ 196,447 $ 213,769