Equity Method Investments (Equity Method Investee, Income (Loss)) (Details) (USD $)	3 Months Ended		6 Months Ended			3 Months Ended		6 Months Ended			3 Months Ended				6 Months Ended					3 Months Ended				6 Months Ended						0 Months Ended	6 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Mar. 31, 2014	Sep. 30, 2014 EPIX [Member]	Sep. 30, 2013 EPIX [Member]	Sep. 30, 2014 EPIX [Member]	Sep. 30, 2013 EPIX [Member]	Mar. 31, 2014 EPIX [Member]	Sep. 30, 2014 TVGN [Member]		Sep. 30, 2013 TVGN [Member]		Sep. 30, 2014 TVGN [Member]		Sep. 30, 2013 TVGN [Member]		Mar. 31, 2014 TVGN [Member]	Sep. 30, 2014 Other equity method investments [Member]		Sep. 30, 2013 Other equity method investments [Member]		Sep. 30, 2014 Other equity method investments [Member]		Sep. 30, 2013 Other equity method investments [Member]		Mar. 31, 2014 Other equity method investments [Member]		Apr. 14, 2014 FEARnet [Member]	Sep. 30, 2014 FEARnet [Member]	Jun. 30, 2014 FEARnet [Member]
Schedule of Equity Method Investments [Line Items]
Equity interests income (loss)	$ 8,245,000	$ 6,502,000	$ 26,455,000	$ 14,479,000		$ 7,724,000	$ 8,881,000	$ 16,232,000	$ 15,622,000		$ (1,323,000)		$ (807,000)		$ (3,548,000)		$ 2,057,000			$ 1,844,000	[1]	$ (1,572,000)	[1]	$ 13,771,000	[1]	$ (3,200,000)	[1]
Equity method investment, ownership percentage						31.15%	31.15%	31.15%	31.15%		50.00%		50.00%		50.00%		50.00%													34.50%
Equity method investment, sales price																														14,600,000
Gain on sale of equity method investee											0	[2]	0	[2]	0	[2]	3,960,000	[2]													11,400,000
Equity method investments, carrying amount	$ 198,680,000		$ 198,680,000		$ 181,941,000	$ 87,201,000		$ 87,201,000		$ 78,758,000	$ 93,249,000				$ 93,249,000				$ 86,298,000	$ 18,230,000	[1]			$ 18,230,000	[1]			$ 16,885,000	[1]			$ 0

[1] The Company records its share of the net income or loss of other equity method investments on a one quarter lag and, accordingly, during the three and six months ended September 30, 2014 and 2013, the Company recorded its share of the income or loss generated by these entities for the three and six months ended June 30, 2014 and 2013, respectively. On April 14, 2014, the Company sold all of its 34.5% interest in FEARnet. The sales price was approximately $14.6 million. The Company has recorded a gain on the sale of $11.4 million within equity interest income in the six months ended September 30, 2014. As a result of this transaction, the Company's equity interest in FEARnet was reduced to zero as of June 30, 2014.

[2] Represents the gain on the May 31, 2013 sale of the Company's 50% interest in TVGuide.com. As a result of the sale, TVGuide.com is considered a discontinued operation by TVGN, and accordingly, the revenues and expenses of TVGuide.com prior to the transaction for all periods presented, are reflected net within the discontinued operations section of the summarized statement of operations for TVGN.