Accounts Payable And Accrued Expenses (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Accounts Payable and Accrued Liabilities, Current [Abstract]
Trade accounts payable	$ 97,592	$ 96,024
Returns and allowances	223,156	236,946
Rebates	118,658	144,860
Chargebacks	2,481	2,971
Accrued interest	45,351	130,182
Accrued payroll and related benefits	45,037	89,895
Accrued royalties and other distribution partner payables	103,649	122,028
Acquisition-related contingent consideration—current	28,305	36,514
Other	176,601	149,780
Total	$ 840,830	$ 1,009,200