GOODWILL AND INTANGIBLE ASSETS: (Details) $ in Thousands	3 Months Ended
Jun. 30, 2018 USD ($)
Goodwill
Goodwill at the beginning of year	$ 595,995
Reallocation of segments	0
Change in foreign currency translation adjustment	(200)
Goodwill at the end of year	595,795
U.S.
Goodwill
Goodwill at the end of year	584,430
APAC
Goodwill
Goodwill at the end of year	11,365
LiveRamp
Goodwill
Goodwill at the beginning of year	203,639
Reallocation of segments	1,377
Change in foreign currency translation adjustment	(62)
Goodwill at the end of year	204,954
LiveRamp \| U.S.
Goodwill
Goodwill at the end of year	201,449
LiveRamp \| APAC
Goodwill
Goodwill at the end of year	3,505
Acxiom Marketing Solutions
Goodwill
Goodwill at the beginning of year	392,356
Reallocation of segments	(1,377)
Change in foreign currency translation adjustment	(138)
Goodwill at the end of year	390,841
Acxiom Marketing Solutions \| U.S.
Goodwill
Goodwill at the end of year	382,981
Acxiom Marketing Solutions \| APAC
Goodwill
Goodwill at the end of year	$ 7,860

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975

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