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Revenue Recognition (Tables)

12 Months Ended

Dec. 31, 2018

Revenue From Contract With Customer [Abstract]

Summarize Activity of the Net Product Revenue Allowance and Reserve Categories

The following table summarizes activity in each of the net product revenue allowance and reserve categories described above for the years ended December 31, 2018 and 2017:

In thousands		Trade Allowances				Rebates, Chargebacks and Discounts				Product Returns				Other Incentives				Total
Balance as of January 1, 2017		$	3,743			$	20,915			$	859			$	1,681			$	27,198
Provision related to current period sales			35,067				126,903				1,480				15,081				178,531
Provision related to prior period sales			(323	)			(682	)			—				(70	)			(1,075	)
Credits/payments made for current period sales			(23,087	)			(96,181	)			(344	)			(12,773	)			(132,385	)
Credits/payments made for prior period sales			(3,365	)			(18,891	)			(108	)			(1,812	)			(24,176	)
Balance as of December 31, 2017			12,035				32,064				1,887				2,107				48,093
Provision related to current period sales			46,002				190,329				1,211				20,732				258,274
Provision related to prior period sales			—				(1,845	)			—				(69	)			(1,914	)
Credits/payments made for current period sales			(29,202	)			(148,857	)			—				(19,307	)			(197,366	)
Credits/payments made for prior period sales			(9,340	)			(30,057	)			(150	)			(2,296	)			(41,843	)
Balance as of December 31, 2018		$	19,495			$	41,634			$	2,948			$	1,167			$	65,244