Equity Method Investments (Carrying Amount Of Significant Equity Method Investments) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	50.00%	50.00%	51.00%
Equity method investments	$ 181,941	$ 169,450
EPIX [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	31.15%	31.15%	31.15%
Equity method investments	78,758	66,697
TVGN [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	50.00%	50.00%	51.00%
Equity method investments	86,298	91,408
Defy Media Group [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	20.00%
Equity method investments	10,000	4,630
Roadside Attractions [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	43.00%
Equity method investments	3,665	3,372
FEARnet [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	34.50%
Equity method investments	$ 3,220	$ 3,343