SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: - Earnings (Loss) per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Basic earnings (loss) per share:
Net loss from continuing operations									$ (8,648)	$ (26,542)	$ (17,340)
Earnings from discontinued operations, net of tax	$ 111	$ (971)	$ 12,068	$ 4,143	$ 2,998	$ 3,819	$ 5,557	$ 3,137	15,351	15,511	26,143
Net earnings (loss)									6,703	(11,031)	8,803
Net loss attributable to noncontrolling interest											(60)
Net earnings (loss) attributable to Acxiom	(1,571)	(1,410)	10,723	(1,039)	(6,039)	4,156	(1,544)	(7,604)	6,703	(11,031)	8,863
Net earnings (loss) attributable to Acxiom	$ (1,571)	$ (1,410)	$ 10,723	$ (1,039)	$ (6,039)	$ 4,156	$ (1,544)	$ (7,604)	$ 6,703	$ (11,031)	$ 8,863
Basic weighted-average shares outstanding									77,616	77,106	74,690
Continuing operations (in dollars per share)									$ (0.11)	$ (0.34)	$ (0.23)
Net earnings from discontinued operations (in dollars per share)	$ 0.00	$ (0.01)	$ 0.15	$ 0.05	$ 0.04	$ 0.05	$ 0.07	$ 0.04	0.20	0.20	0.35
Net earnings (loss) (in dollars per share)									0.09	(0.14)	0.12
Net loss attributable to noncontrolling interest (in dollars per share)											0.00
Net earnings (loss) attributable to Acxiom	(0.02)	(0.02)	0.14	(0.01)	(0.08)	0.05	(0.02)	(0.10)	$ 0.09	$ (0.14)	$ 0.12
Diluted earnings (loss) per share:
Basic weighted-average shares outstanding									77,616	77,106	74,690
Diluted weighted-average shares outstanding									77,616	77,106	74,690
Continuing operations (in dollars per share)									$ (0.11)	$ (0.34)	$ (0.23)
Net earnings (loss) from discontinued operations (in dollars per share)	0.00	(0.01)	0.15	0.05	0.04	0.05	0.07	0.04	0.20	0.20	0.35
Net earnings (loss) (in dollars per share)									0.09	(0.14)	0.12
Net loss attributable to noncontrolling interest (in dollars per share)											0.00
Net earnings (loss) attributable to Acxiom	$ (0.02)	$ (0.02)	$ 0.14	$ (0.01)	$ (0.08)	$ 0.05	$ (0.02)	$ (0.10)	$ 0.09	$ (0.14)	$ 0.12
Options, warrants and restricted stock units, first group
Stockholders' Equity
Number of shares outstanding under options, warrants and restricted stock units (in shares)									1,500	1,400	2,100
Options, warrants and restricted stock units, additional group
Stockholders' Equity
Number of shares outstanding under options, warrants and restricted stock units (in shares)									1,654	1,829	834
Options, warrants and restricted stock units, additional group | Minimum
Stockholders' Equity
Range of exercise prices for options (in dollars per share)									$ 17.49	$ 19.18	$ 29.30
Options, warrants and restricted stock units, additional group | Maximum
Stockholders' Equity
Range of exercise prices for options (in dollars per share)									$ 62.06	$ 62.06	$ 62.06