Revenue Recognition - Schedule of Major Categories of Sales-Related Deductions (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2020 USD ($)
Contract Charge - Backs and Sales Volume Allowances
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance, beginning of period	$ 829,807
Impact from the Acquisitions	12,444
Provision related to sales recorded in the period	2,025,733
Credits/payments issued during the period	(2,197,368)
Balance, end of period	670,616
Cash Discount Allowances
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance, beginning of period	34,308
Impact from the Acquisitions	944
Provision related to sales recorded in the period	60,000
Credits/payments issued during the period	(71,093)
Balance, end of period	24,159
Accrued Returns Allowance
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance, beginning of period	150,361
Impact from the Acquisitions	15,229
Provision related to sales recorded in the period	49,285
Credits/payments issued during the period	(52,202)
Balance, end of period	162,673
Accrued Medicaid and Commercial Rebates
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance, beginning of period	114,960
Impact from the Acquisitions	10
Provision related to sales recorded in the period	69,685
Credits/payments issued during the period	(63,062)
Balance, end of period	$ 121,593