Segment Information (Schedule of Financial Data for Business Segments) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended	0 Months Ended	3 Months Ended						12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended			9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2013 segment	Sep. 30, 2012 Successor [Member]	Dec. 31, 2013 Successor [Member]	Sep. 30, 2013 Successor [Member]	Jun. 30, 2013 Successor [Member]	Mar. 31, 2013 Successor [Member]	Dec. 31, 2012 Successor [Member]	Dec. 31, 2012 Successor [Member]	Dec. 31, 2013 Successor [Member]	Dec. 31, 2012 Successor [Member] Par Pharmaceutical [Member] Operating Segments [Member]	Dec. 31, 2013 Successor [Member] Par Pharmaceutical [Member] Operating Segments [Member]	Dec. 31, 2012 Successor [Member] Strativa [Member] Operating Segments [Member]	Dec. 31, 2013 Successor [Member] Strativa [Member] Operating Segments [Member]	Sep. 28, 2012 Predecessor [Member]	Jun. 30, 2012 Predecessor [Member]	Mar. 31, 2012 Predecessor [Member]	Sep. 28, 2012 Predecessor [Member]	Dec. 31, 2011 Predecessor [Member]	Sep. 28, 2012 Predecessor [Member] Par Pharmaceutical [Member] Operating Segments [Member]	Dec. 31, 2011 Predecessor [Member] Par Pharmaceutical [Member] Operating Segments [Member]	Sep. 28, 2012 Predecessor [Member] Strativa [Member] Operating Segments [Member]	Dec. 31, 2011 Predecessor [Member] Strativa [Member] Operating Segments [Member]
Segment Reporting Information [Line Items]
Number of business segments	2
Total revenues		$ 10,689	$ 306,281	$ 267,321	$ 233,669	$ 290,196	$ 235,450	$ 246,139	$ 1,097,467	$ 227,312	$ 1,028,418	$ 18,827	$ 69,049	$ 238,063	$ 294,333	$ 271,472	$ 803,868	$ 926,138	$ 743,360	$ 834,592	$ 60,508	$ 91,546
Total gross margin		3,627	106,308	81,391	58,900	71,444	41,818	45,445	318,043	33,776	271,396	11,669	46,647	101,350	143,154	97,846	342,350	386,744	296,338	320,313	46,012	66,431
Total operating (loss) income		3,339	(41,828)	(24,725)	(7,499)	8,609	(33,102)	(29,763)	(65,443)	(25,938)	(48,082)	(3,825)	(17,361)	(2,118)	82,771	(21,213)	59,440	(50,593)	116,591	(10,973)	(57,151)	(39,620)
Gain (Loss) on marketable securities and other investments, net								0	1,122								0	237
Gain on bargain purchase								5,500	0								0	0
Interest income								50	87								424	736
Interest expense								(25,985)	(95,484)								(9,159)	(2,676)
Loss on debt extinguishment								0	(7,335)								0	0
(Benefit) provision for income taxes								(17,682)	(61,182)								29,447	(5,996)
(Loss) income from continuing operations								$ (32,516)	$ (105,871)								$ 21,258	$ (46,300)