STOCKHOLDERS' EQUITY: Stock-based compensation activity, by award type (Details) - USD ($) $ in Thousands	12 Months Ended
Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Share-based compensation
Other non-employee stock-based compensation	$ 1,300	$ 1,000	$ 1,300
Total non-cash stock-based compensation included in the consolidated statements of operations	102,700	52,900	39,400
Stock-based compensation of discontinued operations	62,800	10,300	9,700
Non-cash stock-based compensation	151,344	61,460	49,100
Stock options
Share-based compensation
Share-based compensation expense	3,300	5,000	6,900
Performance stock
Share-based compensation
Share-based compensation expense	0	500	1,400
Restricted stock units
Share-based compensation
Share-based compensation expense	67,000	29,100	24,700
Arbor Holdback Agreement \| Arbor
Share-based compensation
Share-based compensation expense	15,300	15,300	5,100
Pacific Data Partners, LLC Agreement Plan \| Pacific Data Partners LLC
Share-based compensation
Share-based compensation expense	15,800	2,000	0
Liability Based Award
Share-based compensation
Total non-cash stock-based compensation included in the consolidated statements of operations	$ (14,200)	$ (1,700)	$ 0

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Allocated Share-based Compensation Expense, Non-Employee

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Disposal Group, Including Discontinued Operation, Allocated Share-based Compensation Expense

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Amount of increase to additional paid-in capital (APIC) from recognition of equity-based compensation.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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