FIXED ASSETS, NET (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Fixed assets
Fixed assets, gross	$ 139,367	$ 110,110
Less: accumulated depreciation	96,795	84,748
Fixed assets, net	42,572	25,362
Depreciation expense	13,203	10,200	11,467
Computer equipment
Fixed assets
Fixed assets, gross	55,751	36,152
Computer software
Fixed assets
Fixed assets, gross	38,111	31,466
Leasehold improvements
Fixed assets
Fixed assets, gross	33,968	31,339
Office equipment
Fixed assets
Fixed assets, gross	5,672	5,819
Furniture and fixtures
Fixed assets
Fixed assets, gross	$ 5,865	$ 5,334