Segment Information - Financial Information by Segment (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
REVENUES, NET:
Revenues	$ 153,386	$ 165,625	$ 190,944	$ 184,063	$ 186,057	$ 202,428	$ 199,140	$ 253,420	$ 694,018	$ 841,045	$ 1,116,843
GROSS PROFIT:
Gross Profit	$ 25,247	$ 57,262	$ 81,279	$ 82,228	$ 82,905	$ 97,763	$ 102,769	$ 148,769	246,016	432,206	673,512
Prescription Pharmaceuticals
REVENUES, NET:
Revenues									620,669	772,524	1,053,579
GROSS PROFIT:
Gross Profit									213,560	402,082	644,319
Consumer Health
REVENUES, NET:
Revenues									73,349	68,521	63,264
GROSS PROFIT:
Gross Profit									$ 32,456	$ 30,124	$ 29,193