SEGMENT AND GEOGRAPHIC INFORMATION (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011 segment	Dec. 31, 2010
SEGMENT AND GEOGRAPHIC INFORMATION
Number of reportable segments			1
Net revenue by geographic region:
Total net revenue	$ 236,325	$ 334,259	$ 677,739	$ 954,621
United States
Net revenue by geographic region:
Total net revenue	153,768	205,642	354,547	498,949
Canada
Net revenue by geographic region:
Total net revenue	9,113	16,258	38,194	48,696
North America
Net revenue by geographic region:
Total net revenue	162,881	221,900	392,741	547,645
Rest of Europe
Net revenue by geographic region:
Total net revenue	42,766	57,882	151,703	230,340
United Kingdom
Net revenue by geographic region:
Total net revenue	7,625	21,039	60,411	90,871
Asia Pacific and other
Net revenue by geographic region:
Total net revenue	$ 23,053	$ 33,438	$ 72,884	$ 85,765