FIXED ASSETS, NET (Details) - USD ($) $ in Thousands	12 Months Ended
Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Fixed assets
Fixed assets, gross	$ 246,462	$ 188,517
Less: accumulated depreciation	(143,984)	(121,217)
Fixed assets, net	102,478	67,300
Depreciation expense	32,202	30,707	$ 28,800
Computer equipment
Fixed assets
Fixed assets, gross	87,926	75,281
Computer software
Fixed assets
Fixed assets, gross	47,702	41,527
Leasehold improvements
Fixed assets
Fixed assets, gross	88,762	56,758
Office equipment
Fixed assets
Fixed assets, gross	8,139	5,843
Furniture and fixtures
Fixed assets
Fixed assets, gross	13,933	9,108
Fixed Assets, Net
Fixed assets
Depreciation expense	$ 32,202	$ 30,629	$ 28,800

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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No definition available.

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+ References

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