Consolidating Financial Information - Convertible Senior Subordinated Notes (Balance Sheet) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Mar. 31, 2013	Sep. 30, 2012	Mar. 31, 2012
Assets
Cash and cash equivalents	$ 67,212	$ 62,363	$ 54,399	$ 64,298
Restricted cash	8,122	10,664
Accounts receivable, net	696,584	787,150
Investment in films and television programs, net	1,208,239	1,244,075
Property and equipment, net	10,586	8,530
Equity method investments	164,662	169,450
Goodwill	323,328	323,328
Other assets	80,485	72,619
Deferred tax assets	92,657	82,690
Total assets	2,651,875	2,760,869
Liabilities and Shareholders' Equity (Deficiency)
Senior revolving credit facility	285,474	338,474
Senior secured second-priority notes	225,000	432,277
July 2013 Term Loan	222,574	0
Accounts payable and accrued liabilities	217,680	313,620
Participations and residuals	413,368	409,763
Film obligations and production loans	444,161	569,019
Deferred revenue	269,067	254,023
Shareholders' equity (deficiency)	426,053	356,526
Total liabilities and shareholders' equity	2,651,875	2,760,869
Convertible Senior Subordinated Notes [Member]
Assets
Cash and cash equivalents	67,212	62,363	54,399	64,298
Restricted cash	8,122	10,664
Accounts receivable, net	696,584	787,150
Investment in films and television programs, net	1,208,239	1,244,075
Property and equipment, net	10,586	8,530
Equity method investments	164,662	169,450
Goodwill	323,328	323,328
Other assets	80,485	72,619
Deferred tax assets	92,657	82,690
Subsidiary investments and advances	0	0
Total assets	2,651,875	2,760,869
Liabilities and Shareholders' Equity (Deficiency)
Senior revolving credit facility	285,474	338,474
Senior secured second-priority notes	222,574	432,277
July 2013 Term Loan	225,000
Accounts payable and accrued liabilities	217,680	313,620
Participations and residuals	413,368	409,763
Film obligations and production loans	444,161	569,019
Convertible senior subordinated notes	148,498	87,167
Deferred revenue	269,067	254,023
Intercompany payable	0	0
Shareholders' equity (deficiency)	426,053	356,526
Total liabilities and shareholders' equity	2,651,875	2,760,869
Convertible Senior Subordinated Notes [Member] | Lions Gate Entertainment Corp. [Member]
Assets
Cash and cash equivalents	1,775	592	1,036	561
Restricted cash	0	0
Accounts receivable, net	696	655
Investment in films and television programs, net	243	246
Property and equipment, net	0	0
Equity method investments	0	0
Goodwill	10,173	10,173
Other assets	4,269	49,195
Deferred tax assets	12,929	0
Subsidiary investments and advances	897,813	296,373
Total assets	927,898	357,234
Liabilities and Shareholders' Equity (Deficiency)
Senior revolving credit facility	0	0
Senior secured second-priority notes	222,574	0
July 2013 Term Loan	225,000
Accounts payable and accrued liabilities	6,261	449
Participations and residuals	0	186
Film obligations and production loans	0	73
Convertible senior subordinated notes	0	0
Deferred revenue	0	0
Intercompany payable	48,010	0
Shareholders' equity (deficiency)	426,053	356,526
Total liabilities and shareholders' equity	927,898	357,234
Convertible Senior Subordinated Notes [Member] | Lions Gate Entertainment Inc. [Member]
Assets
Cash and cash equivalents	35,331	36,834	8,983	477
Restricted cash	8,122	9,903
Accounts receivable, net	3,524	5,017
Investment in films and television programs, net	6,394	6,391
Property and equipment, net	10,146	8,019
Equity method investments	5,226	8,005
Goodwill	0	0
Other assets	74,070	56,544
Deferred tax assets	66,176	69,118
Subsidiary investments and advances	869,948	451,668
Total assets	1,078,937	651,499
Liabilities and Shareholders' Equity (Deficiency)
Senior revolving credit facility	285,474	338,474
Senior secured second-priority notes	0	432,277
July 2013 Term Loan	0
Accounts payable and accrued liabilities	39,381	104,078
Participations and residuals	3,408	3,411
Film obligations and production loans	0	0
Convertible senior subordinated notes	148,498	87,167
Deferred revenue	13,080	14,899
Intercompany payable	904,322	0
Shareholders' equity (deficiency)	(315,226)	(328,807)
Total liabilities and shareholders' equity	1,078,937	651,499
Convertible Senior Subordinated Notes [Member] | Non-guarantor Subsidiaries [Member]
Assets
Cash and cash equivalents	30,106	24,937	44,380	63,260
Restricted cash	0	761
Accounts receivable, net	692,364	781,478
Investment in films and television programs, net	1,200,153	1,238,966
Property and equipment, net	440	511
Equity method investments	159,436	162,262
Goodwill	313,155	313,155
Other assets	8,717	15,879
Deferred tax assets	13,552	13,572
Subsidiary investments and advances	63,017	0
Total assets	2,480,940	2,551,521
Liabilities and Shareholders' Equity (Deficiency)
Senior revolving credit facility	0	0
Senior secured second-priority notes	0	0
July 2013 Term Loan
Accounts payable and accrued liabilities	172,170	209,258
Participations and residuals	409,931	406,077
Film obligations and production loans	444,161	568,946
Convertible senior subordinated notes	0	49,000
Deferred revenue	255,987	239,124
Intercompany payable	251,600	320,522
Shareholders' equity (deficiency)	947,091	758,594
Total liabilities and shareholders' equity	2,480,940	2,551,521
Convertible Senior Subordinated Notes [Member] | Consolidating Adjustments [Member]
Assets
Cash and cash equivalents	0	0	0	0
Restricted cash	0	0
Accounts receivable, net	0	0
Investment in films and television programs, net	1,449	(1,528)
Property and equipment, net	0	0
Equity method investments	0	(817)
Goodwill	0	0
Other assets	(6,571)	(48,999)
Deferred tax assets	0	0
Subsidiary investments and advances	(1,830,778)	(748,041)
Total assets	(1,835,900)	(799,385)
Liabilities and Shareholders' Equity (Deficiency)
Senior revolving credit facility	0	0
Senior secured second-priority notes	0	0
July 2013 Term Loan	0
Accounts payable and accrued liabilities	(132)	(165)
Participations and residuals	29	89
Film obligations and production loans	0	0
Convertible senior subordinated notes	0	(49,000)
Deferred revenue	0	0
Intercompany payable	(1,203,932)	(320,522)
Shareholders' equity (deficiency)	(631,865)	(429,787)
Total liabilities and shareholders' equity	$ (1,835,900)	$ (799,385)