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100460 - Disclosure - Intangible Assets and Goodwill - Schedule of Changes in Carrying Amount of Goodwill (Details)
(http://www.acorda.com/20161231/taxonomy/role/DisclosureIntangibleAssetsAndGoodwillScheduleOfChangesInCarryingAmountOfGoodwillDetails)
Table(Implied)
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Reporting Entity [Axis]0001008848 (http://www.sec.gov/CIK)
Goodwill And Intangible Assets Disclosure [Abstract]Period [Axis]
2016-01-01 - 2016-12-31
Goodwill And Intangible Assets Disclosure [Abstract]
 
Changes in carrying amount of goodwill
 
Beginning balance
183,636,000  
Goodwill associated with the acquisition of Biotie Therapies Corp.
102,676,000  
Increase to goodwill due to measurement period adjustments
1,200,000  
Foreign currency translation adjustment
(6,913,000) 
Ending balance
280,599,000