DISCONTINUED OPERATIONS: Reconciliation of the major classes of line items constituting earnings from discontinued operations (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Earnings from discontinued operations, net of tax	$ 0	$ 24,803
Acxiom Marketing Solutions | Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues		164,489
Costs of revenues		93,617
Gross profit		70,872
Research and development		7,566
Sales and marketing		21,527
General and administrative		16,594
Gains, losses and other items, net		1,284
Total operating expense		46,971
Income from discontinued operations		23,901
Interest expense		(2,838)
Other, net		168
Earnings from discontinued operations before income taxes		21,231
Income taxes		(3,572)
Earnings from discontinued operations, net of tax		$ 24,803