Segment Information - Financial Information by Segment (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
REVENUES, NET:
Revenues	$ 162,257	$ 176,244	$ 178,057	$ 165,871	$ 153,386	$ 165,625	$ 190,944	$ 184,063	$ 682,429	$ 694,018	$ 841,045
GROSS PROFIT:
Gross Profit	$ 59,807	$ 71,402	$ 67,984	$ 53,513	$ 25,247	$ 57,262	$ 81,279	$ 82,228	252,706	246,016	432,206
Prescription Pharmaceuticals
REVENUES, NET:
Revenues									604,212	620,669	772,524
GROSS PROFIT:
Gross Profit									217,767	213,560	402,082
Consumer Health
REVENUES, NET:
Revenues									78,217	73,349	68,521
GROSS PROFIT:
Gross Profit									$ 34,939	$ 32,456	$ 30,124