GOODWILL AND INTANGIBLE ASSETS: - Amounts allocated to intangible assets from acquisitions (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Jun. 30, 2018
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	$ 121,314	$ 121,296
Accumulated amortization	(76,775)	(82,820)
Total finite-lived intangible assets, net	44,539	38,476
LiveRamp
Finite-Lived Intangible Assets [Line Items]
Total finite-lived intangible assets, net		38,472
Acxiom Marketing Solutions
Finite-Lived Intangible Assets [Line Items]
Total finite-lived intangible assets, net		4
Developed technology, gross (Software)
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	54,150	54,150
Accumulated amortization	(43,533)	(47,119)
Total finite-lived intangible assets, net	10,617	7,031
Developed technology, gross (Software) | LiveRamp
Finite-Lived Intangible Assets [Line Items]
Total finite-lived intangible assets, net		7,031
Developed technology, gross (Software) | Acxiom Marketing Solutions
Finite-Lived Intangible Assets [Line Items]
Total finite-lived intangible assets, net		0
Trade name
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	43,364	43,346
Accumulated amortization	(27,953)	(29,421)
Total finite-lived intangible assets, net	15,411	13,925
Trade name | LiveRamp
Finite-Lived Intangible Assets [Line Items]
Total finite-lived intangible assets, net		13,921
Trade name | Acxiom Marketing Solutions
Finite-Lived Intangible Assets [Line Items]
Total finite-lived intangible assets, net		4
Publisher Relationship
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	23,800	23,800
Accumulated amortization	(5,289)	(6,280)
Total finite-lived intangible assets, net	$ 18,511	17,520
Publisher Relationship | LiveRamp
Finite-Lived Intangible Assets [Line Items]
Total finite-lived intangible assets, net		17,520
Publisher Relationship | Acxiom Marketing Solutions
Finite-Lived Intangible Assets [Line Items]
Total finite-lived intangible assets, net		$ 0
Minimum
Finite-Lived Intangible Assets [Line Items]
Amortization period	2 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Amortization period	10 years