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Revenue Recognition (Tables) | 12 Months Ended
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Dec. 31, 2019
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, 2019 and 2018:
In thousands |  | Trade Allowances |  |  | Rebates, Chargebacks and Discounts |  |  | Product Returns |  |  | Other Incentives |  |  | Total |
Balance as of January 1, 2018 |  | $ | 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 |
Provision related to current period sales |  |  | 92,378 |  |  |  | 403,865 |  |  |  | 2,430 |  |  |  | 47,169 |  |  |  | 545,842 |
Provision related to prior period sales |  |  | — |  |  |  | (324 | ) |  |  | — |  |  |  | — |  |  |  | (324 | )
Credits/payments made for current period sales |  |  | (63,288 | ) |  |  | (312,790 | ) |  |  | 5 |  |  |  | (43,416 | ) |  |  | (419,489 | )
Credits/payments made for prior period sales |  |  | (19,324 | ) |  |  | (41,388 | ) |  |  | (804 | ) |  |  | (1,200 | ) |  |  | (62,716 | )
Balance as of December 31, 2019 |  | $ | 29,261 |  |  | $ | 90,997 |  |  | $ | 4,579 |  |  | $ | 3,720 |  |  | $ | 128,557 |

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