Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Accounts Payable and Accrued Liabilities, Current [Abstract]
Trade accounts payable	$ 113,049	$ 101,532
Returns and allowances	217,198	206,248
Rebates	107,057	129,056
Chargebacks	2,664	1,594
Accrued interest	56,783	112,860
Accrued payroll and related benefits	61,524	79,869
Accrued royalties and other distribution partner payables	70,953	115,816
Acquisition-related contingent consideration—current	9,142	6,534
Other	117,994	146,440
Total	$ 756,364	$ 899,949