ACQUISITIONS: (Details) (USD $)	0 Months Ended	12 Months Ended
	Jul. 01, 2014	Mar. 31, 2015	Mar. 31, 2014	Jul. 01, 2014	Mar. 31, 2013
Business acquisitions
Net cash paid in acquisitions		$ 265,672,000	$ 500,000
Impairment of goodwill and other intangibles			24,953,000
Impairment charge		0	23,313,000
Remaining noncontrolling interest acquired			600,000
Reduction in carrying value of noncontrolling interest			600,000
Amortization lives for intangibles		6 years
Fair value of consideration
Contractual term for settlement of purchase escrow	1 year
Purchase price allocation
Goodwill		568,870,000	358,384,000		381,129,000
Receivables
Gross accounts receivable	5,200,000			5,200,000
Developed technology assets
Purchase price allocation
Other intangible assets	40,000,000			40,000,000
Other intangible assets | Minimum
Business acquisitions
Amortization lives for intangibles		2 years
Other intangible assets | Maximum
Business acquisitions
Amortization lives for intangibles		6 years
Customer relationship
Purchase price allocation
Other intangible assets	25,000,000			25,000,000
Trade name
Purchase price allocation
Other intangible assets	1,500,000			1,500,000
LiveRamp Inc
Business acquisitions
Net cash paid in acquisitions	265,672,000
Fair value of consideration
Cash, net of $12.0 million cash acquired	234,672,000
Restricted cash held in escrow	31,000,000
Fair value of stock options included in purchase price	6,978,000
Total fair value of consideration transferred	272,650,000
Stock options assumed
Total fair value of stock options assumed, including amounts allocated to future services	30,500,000
Fair value of stock options allocated to the purchase consideration	6,978,000
Stock options assumed allocated to future services	23,500,000
Purchase price allocation
Cash	12,016,000			12,016,000
Trade accounts receivable	5,206,000			5,206,000
Deferred income tax assets	10,444,000			10,444,000
Goodwill	213,093,000			213,093,000
Other intangible assets	66,500,000			66,500,000
Other current and noncurrent assets	1,306,000			1,306,000
Total assets	308,565,000			308,565,000
Deferred income tax liabilities	(18,945,000)			(18,945,000)
Accounts payable, accrued expenses and deferred revenue	(4,954,000)			(4,954,000)
Net assets acquired	284,666,000			284,666,000
Less:
Cash Acquired from Acquisition	12,016,000
Net purchase price allocated	272,650,000
Fair value of stock options included in purchase price	6,978,000
LiveRamp Inc | Minimum
Business acquisitions
Amortization lives for intangibles	2 years
LiveRamp Inc | Maximum
Business acquisitions
Amortization lives for intangibles	6 years
LiveRamp Inc | Developed technology assets
Business acquisitions
Amortization lives for intangibles	4 years
Purchase price allocation
Other intangible assets	40,000,000			40,000,000
LiveRamp Inc | Other intangible assets
Purchase price allocation
Other intangible assets	26,500,000			26,500,000
LiveRamp Inc | Customer relationship
Business acquisitions
Amortization lives for intangibles	6 years
LiveRamp Inc | Trade name
Business acquisitions
Amortization lives for intangibles	2 years
GoDigital
Business acquisitions
Remaining noncontrolling interest acquired			600,000
Reduction in carrying value of noncontrolling interest			400,000
Noncontrolling interest			0
Adjustment to equity investment reflected in additional paid-in capital			$ 1,000,000