DISPOSITION: Reconciliation of the major classes of line items constituting earnings from discontinued operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Earnings from discontinued operations, net of tax	$ 61,803	$ 22,665	$ 86,606	$ 48,444
Acxiom Marketing Solutions | Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues	167,696	171,227	332,185	336,984
Costs of revenues	95,218	91,063	188,835	180,962
Gross profit	72,478	80,164	143,350	156,022
Research and development	7,352	8,414	14,918	17,137
Sales and marketing	21,106	24,137	42,633	48,486
General and administrative	27,789	8,200	44,383	16,969
Gains, losses and other items, net	1,369	827	2,653	732
Total operating expense	57,616	41,578	104,587	83,324
Income from discontinued operations	14,862	38,586	38,763	72,698
Interest expense	(2,864)	(2,524)	(5,702)	(4,866)
Other, net	(145)	(71)	23	(163)
Earnings from discontinued operations before income taxes	11,853	35,991	33,084	67,669
Income taxes	(49,950)	13,326	(53,522)	19,225
Earnings from discontinued operations, net of tax	$ 61,803	$ 22,665	$ 86,606	$ 48,444