Investment In Films And Television Programs (Schedule Of Acquired Libraries) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Sep. 30, 2013	Mar. 31, 2013
Total acquired libraries	$ 18,588	$ 22,408
Trimark Holdings [Member]
Total amortization period (in years)	20 years
Remaining amortization period (in years)	0 years
Total acquired libraries	0	345
Artisan Entertainment [Member]
Total amortization period (in years)	20 years
Remaining amortization period (in years)	10 years 3 months
Total acquired libraries	13,268	15,686
Lionsgate UK [Member]
Total amortization period (in years)	20 years
Remaining amortization period (in years)	12 years
Total acquired libraries	150	233
Summit Entertainment, LLC [Member]
Total amortization period (in years)	20 years
Remaining amortization period (in years)	18 years 3 months
Total acquired libraries	$ 5,170	$ 6,144
Maximum [Member]
Total amortization period (in years)	20 years