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Fair Value Measurements - Textual (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Percentage of increase in discount rate 1.00%opk_PercentageOfIncreaseDecreaseInDiscountRate  
Decrease in contingent consideration on discount rates increase $ 1.7opk_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationIfDiscountRatesIncreaseOnePercent  
Percentage of decrease in future sales 10.00%opk_PercentageOfIncreaseDecreaseInFutureSales  
Decrease of estimated future sales in amount 2.0opk_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationIfEstimatedFutureSalesDecreaseTenPercent  
Contingent consideration 76.5us-gaap_BusinessCombinationContingentConsiderationLiability 71.6us-gaap_BusinessCombinationContingentConsiderationLiability
Minimum    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Discount rates related to consideration 6.00%us-gaap_FairValueInputsDiscountRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
 
Maximum    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Discount rates related to consideration 27.00%us-gaap_FairValueInputsDiscountRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
 
Accrued Liabilities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Contingent consideration 52.8us-gaap_BusinessCombinationContingentConsiderationLiability
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_AccruedLiabilitiesMember
27.4us-gaap_BusinessCombinationContingentConsiderationLiability
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_AccruedLiabilitiesMember
Other Noncurrent Liabilities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Contingent consideration $ 23.7us-gaap_BusinessCombinationContingentConsiderationLiability
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherNoncurrentLiabilitiesMember
$ 44.2us-gaap_BusinessCombinationContingentConsiderationLiability
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherNoncurrentLiabilitiesMember