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Revenue Recognition (Tables) | 9 Months Ended
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Sep. 30, 2019
Revenue From Contract With Customer [Abstract] |
Summarize Activity of the Net Product Revenue Allowance and Reserve Categories | The following tables summarize activity in each of the net product revenue allowance and reserve categories described above for the nine months ended September 30, 2019 and 2018:
In thousands |  | Trade Allowances |  |  | Rebates, Chargebacks and Discounts |  |  | Product Returns |  |  | Other Incentives |  |  | Total |
Balance as of December 31, 2018 |  | $ | 19,495 |  |  | $ | 41,634 |  |  | $ | 2,948 |  |  | $ | 1,167 |  |  | $ | 65,244 |
Provision related to current period sales |  |  | 62,177 |  |  |  | 274,439 |  |  |  | 1,635 |  |  |  | 30,882 |  |  |  | 369,133 |
Provision related to prior period sales |  |  | — |  |  |  | (204 | ) |  |  | — |  |  |  | — |  |  |  | (204 | )
Credits/payments made for current period sales |  |  | (34,400 | ) |  |  | (184,801 | ) |  |  | 5 |  |  |  | (30,404 | ) |  |  | (249,600 | )
Credits/payments made for prior period sales |  |  | (19,325 | ) |  |  | (41,363 | ) |  |  | (653 | ) |  |  | (1,199 | ) |  |  | (62,540 | )
Balance as of September 30, 2019 |  | $ | 27,947 |  |  | $ | 89,705 |  |  | $ | 3,935 |  |  | $ | 446 |  |  | $ | 122,033 |
In thousands |  | Trade Allowances |  |  | Rebates, Chargebacks and Discounts |  |  | Product Returns |  |  | Other Incentives |  |  | Total |
Balance as of December 31, 2017 |  | $ | 12,035 |  |  | $ | 32,064 |  |  | $ | 1,887 |  |  | $ | 2,107 |  |  | $ | 48,093 |
Provision related to current period sales |  |  | 30,814 |  |  |  | 128,905 |  |  |  | 812 |  |  |  | 14,636 |  |  |  | 175,167 |
Provision related to prior period sales |  |  | (660 | ) |  |  | (836 | ) |  |  | — |  |  |  | (69 | ) |  |  | (1,565 | )
Credits/payments made for current period sales |  |  | (15,908 | ) |  |  | (76,015 | ) |  |  | — |  |  |  | (15,038 | ) |  |  | (106,961 | )
Credits/payments made for prior period sales |  |  | (11,657 | ) |  |  | (29,594 | ) |  |  | (69 | ) |  |  | (2,297 | ) |  |  | (43,617 | )
Balance as of September 30, 2018 |  | $ | 14,624 |  |  | $ | 54,524 |  |  | $ | 2,630 |  |  | $ | (661 | ) |  | $ | 71,117 |

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