Equity Method Investments (Summarized Statement Of Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2014		Dec. 31, 2013
Reconciliation of net income (loss) reported by investee to equity interest income (loss):
Total equity interest income (loss) recorded	$ 10,898		$ (1,321)		$ 37,353		$ 13,158
EPIX [Member]
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]
Revenues	101,124		89,768		288,424		261,998
Expenses:
Operating expenses	59,224		60,973		178,690		182,259
Selling, marketing, general and administrative expenses	5,863		5,791		17,503		17,054
Operating income (loss)	36,037		23,004		92,231		62,685
Interest and other expense	(399)		(163)		(1,130)		(1)
Net income (loss)	35,638		22,841		91,101		62,684
Reconciliation of net income (loss) reported by investee to equity interest income (loss):
Net income (loss)	35,638		22,841		91,101		62,684
Ownership interest in investee	31.15%		31.15%		31.15%		31.15%
The Company's share of net income (loss)	11,101		7,115		28,378		19,526
Eliminations of the Company's share of profits on licensing sales to investee	(1,935)	[1]	(3,606)	[1]	(7,007)	[1]	(9,226)	[1]
Realization of the Company's share of profits on licensing sales to investee	2,048	[2]	2,105	[2]	6,075	[2]	10,936	[2]
Total equity interest income (loss) recorded	11,214		5,614		27,446		21,236
POP [Member]
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]
Revenues	20,507		20,058		59,073		55,023
Expenses:
Cost of services	8,645		13,874		26,938		27,877
Selling, marketing, general and administrative expenses	11,934		12,446		34,527		32,923
Depreciation and amortization	1,928		2,040		5,866		6,034
Operating income (loss)	(2,000)		(8,302)		(8,258)		(11,811)
Other expense (income)	6		160		391		(1,230)
Interest expense, net	160		297		551		979
Accretion of redeemable preferred stock units	12,461	[3]	10,347	[3]	35,361	[3]	29,498	[3]
Total interest expense, net	12,627		10,804		36,303		29,247
Loss from continuing operations	(14,627)		(19,106)		(44,561)		(41,058)
Loss from discontinued operations	0		(1,685)		0		(2,799)
Net income (loss)	(14,627)		(20,791)		(44,561)		(43,857)
Reconciliation of net income (loss) reported by investee to equity interest income (loss):
Net income (loss)	(14,627)		(20,791)		(44,561)		(43,857)
Ownership interest in investee	50.00%		50.00%		50.00%		50.00%
The Company's share of net income (loss)	(7,314)		(10,396)		(22,281)		(21,929)
Gain on sale of the Company's 50% share of TVGuide.com	0	[4]	0	[4]	0	[4]	3,960	[4]
Accretion of dividend and interest income on redeemable preferred stock units	6,231	[3]	5,173	[3]	17,681	[3]	14,749	[3]
Eliminations of the Company's share of profits on licensing sales to investee	0		0		(367)		0
Realization of the Company's share of profits on licensing sales to investee	(32)		0		304		54
Total equity interest income (loss) recorded	$ (1,115)		$ (5,223)		$ (4,663)		$ (3,166)

[1] Represents the elimination of the gross profit recognized by the Company on licensing sales to EPIX in proportion to the Company's ownership interest in EPIX. The table below sets forth the revenues and gross profits recognized by the Company and the calculation of the profit eliminated for the three and nine months ended December 31, 2014 and 2013: (Amounts in thousands) Three months ended December 31, 2014 and 2013: Revenue recognized on licensing sales to EPIX - $15,349 and $24,740, respectively; Gross profit on licensing sales to EPIX - $6,213 and $11,576, respectively; Ownership interest in EPIX - 31.15% and 31.15%, respectively; Elimination of the Company's share of profits on licensing sales to EPIX - $1,935 and $3,606, respectively. Nine months ended December 31, 2014 and 2013: Revenue recognized on licensing sales to EPIX - $41,281 and $47,871, respectively; Gross profit on licensing sales to EPIX - $22,493 and $29,619, respectively; Ownership interest in EPIX - 31.15% and 31.15%, respectively; Elimination of the Company's share of profits on licensing sales to EPIX - $7,007 and $9,226, respectively.

[2] Represents the realization of a portion of the profits previously eliminated. This profit remains eliminated until realized by EPIX. EPIX initially records the license fee for the title as inventory on its balance sheet and amortizes the inventory over the license period. Accordingly, the profit is realized as the inventory on EPIX's books is amortized.

[3] Accretion of mandatorily redeemable preferred stock units represents POP's 10% dividend and the amortization of discount on its mandatorily redeemable preferred stock units held by the Company and the other interest holder. The Company recorded its share of this expense as income from the accretion of dividend and discount on mandatorily redeemable preferred stock units within equity interest income (loss).

[4] 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 POP, 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 POP.