Revenue Recognition (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014
Revenue Recognition
Beginning balance	$ 11,872	$ 18,104
Provision related to sales made in the current period	162,238	156,235
Credits issued to third parties	(158,893)	(162,467)
Ending balance	$ 15,217	$ 11,872

Represents the amount the Company agrees to reimburse wholesalers for differences between the gross sales prices, at which the Company sells its products to wholesalers and the actual prices of such products at the time wholesalers resell them under the Company’s various contractual arrangements with third parties such as hospitals and group purchasing organizations.

No definition available.

Name:	amph_RevenueRecognitionWholesalerChargebacks
Namespace Prefix:	amph_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant