Segment Information - Financial Information by Segment (Details) - USD ($) $ in Thousands	3 Months Ended												6 Months Ended			9 Months Ended			12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
REVENUES
REVENUES	$ 279,977	$ 256,801	$ 220,920	$ 227,378	$ 202,856	$ 127,698	$ 133,872	$ 90,622	$ 84,953	$ 81,892	$ 77,012	$ 73,854	$ 448,298	$ 224,494	$ 150,866	$ 705,099	$ 352,192	$ 232,758	$ 985,076	$ 555,048	$ 317,711
GROSS PROFIT
Gross Profit	$ 174,430	163,012	128,407	130,163	$ 105,333	45,500	60,871	49,656	$ 46,970	43,697	42,092	39,145	258,570	110,527	81,237	421,582	156,027	124,934	596,012	261,360	171,904
Prescription Pharmaceuticals [Member]
REVENUES
REVENUES		240,995	206,062	210,554		114,953	119,481	81,848		72,677	67,362	65,146	416,616	201,327	132,508	657,611	316,280	205,185	924,472	504,688	279,911
GROSS PROFIT
Gross Profit		155,242	120,929	121,159		39,246	52,335	45,284		38,372	36,743	34,023	242,088	97,619	70,766	397,330	136,865	109,138	566,298	233,833	151,182
Consumer Health [Member]
REVENUES
REVENUES		15,806	14,858	16,824		12,745	14,391	8,774		9,215	9,650	8,708	31,682	23,167	18,358	47,488	35,912	27,573	60,604	50,360	37,800
GROSS PROFIT
Gross Profit		$ 7,770	$ 7,478	$ 9,004		$ 6,254	$ 8,536	$ 4,372		$ 5,325	$ 5,349	$ 5,122	$ 16,482	$ 12,908	$ 10,471	$ 24,252	$ 19,162	$ 15,796	$ 29,714	$ 27,527	$ 20,722