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Component: (Network and Table)
Network
2412407 - Disclosure - Income Taxes - Reconciliation of Uncertain Tax Positions (Details)
(http://www.amagpharma.com/role/IncomeTaxesReconciliationOfUncertainTaxPositionsDetails)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000792977 (http://www.sec.gov/CIK)
Income Tax Disclosure [Abstract]Period [Axis]
2016-01-01 - 2016-12-31
2015-01-01 - 2015-12-31
2014-01-01 - 2014-12-31
Income Tax Disclosure [Abstract]
 
 
 
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
 
 
 
Uncertain tax benefits at the beginning of the year
12,695,000  
0  
0  
Additions based on tax positions related to the current year
300,000  
12,695,000  
0  
Additions for tax positions from prior years
379,000  
0  
0  
Subtractions for tax positions from prior years
(44,000) 
0  
0  
Uncertain tax benefits at the end of the year
13,330,000  
 
12,695,000  
 
0