Film Obligations And Production Loans (Narrative) (Details) (USD $)	9 Months Ended
	Dec. 31, 2011 years	Mar. 31, 2011	Apr. 09, 2008
Individual Production Loans [Member]
Interest rate range, minimum	3.55%
Interest rate range, maximum	4.25%
Production loans	$ 244,678,000	$ 181,829,000
Pennsylvania Regional Center Production Loans [Member]
Maximum available production loans under Pennsylvania Regional Center facility			65,500,000
Line of credit facility, term	5
Line of credit facility, performance conditions, term	2
Production loans	65,500,000	65,500,000
Line of credit facility, remaining borrowing capacity	0	0
Coupon rate	1.50%
Commitment fees under Film Credit Facility, percentage	5.00%
Film Credit Facility [Member]
Production loans	40,625,000	20,430,000
Maximum amount available under Film Credit Facility	130,000,000
Amount to which the Film Credit Facility can be increased if additional qualified lenders are obtained	200,000,000
Film Credit Facility, basis spread on variable rate	3.25%
Weighted average interest rate on borrowings outstanding	3.55%	3.49%
Film Credit Facility, frequency of commitment fee payment	quarterly
Film Credit Facility, commitment fee percentage	0.75%
Film Credit Facility, minimum collateral amount	25,000,000
Interest Bearing [Member] | Individual Production Loans [Member]
Individual production loans, interest bearing	214,700,000
Non-interest Bearing [Member] | Individual Production Loans [Member]
Production loans, non-interest bearing	30,000,000
Convertible Senior Subordinated Notes [Member] | Pennsylvania Regional Center Production Loans [Member]
Principal value of certain collateral held under senior credit facility		72,800,000
Fair value of certain collateral held under senior credit facility		72,400,000
Convertible Senior Subordinated Notes [Member] | Pennsylvania Regional Center Production Loans [Member] | Carrying Value [Member]
Principal value of certain collateral held under senior credit facility	72,800,000
Convertible Senior Subordinated Notes [Member] | Pennsylvania Regional Center Production Loans [Member] | Fair Value [Member]
Fair value of certain collateral held under senior credit facility	$ 72,700,000