Significant Accounting Policies (Diluted Net Income Per Common Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended												12 Months Ended
	Mar. 31, 2016		Dec. 31, 2015		Sep. 30, 2015		Jun. 30, 2015		Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Numerator:
Net income attributable to Lions Gate Entertainment Corp. shareholders	$ 10,877	[1]	$ 40,717	[1]	$ (42,069)	[1]	$ 40,684	[1]	$ 19,554	$ 98,185	$ 20,781	$ 43,261	$ 50,209	$ 181,781	$ 152,037
Interest on convertible notes, net of tax													450	5,515	8,573
Numerator for diluted net income per common share													$ 50,659	$ 187,296	$ 160,610
Denominator:
Weighted average common shares outstanding (in shares)													148,480	139,048	137,468
Conversion of notes (in shares)													2,098	9,508	13,736
Share purchase options (in shares)													3,129	2,773	2,593
Restricted share units (in shares)													381	449	618
Adjusted weighted average common shares outstanding (in shares)													154,088	151,778	154,415
Diluted net income per common share (in usd per share)	$ 0.07		$ 0.26		$ (0.28)		$ 0.26		$ 0.14	$ 0.65	$ 0.15	$ 0.30	$ 0.33	$ 1.23	$ 1.04

[1] During the second, third and fourth quarter of fiscal 2016, net income included restructuring and other items, net of tax, of $2.7 million, $11.7 million, and $1.5 million, respectively (see Note 16). For the third quarter of fiscal 2016, net income attributable to Lions Gate Entertainment Corp. shareholders included restructuring and other items, net of tax, of $4.0 million.