EARNINGS PER SHARE AND STOCKHOLDERS' EQUITY: (Details) (USD $)	3 Months Ended		6 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Mar. 31, 2014	Aug. 31, 2011
Stockholders' Equity
Maximum amount of common stock that may be repurchased						$ 250,000,000
Shares repurchased			0.5
Repurchase of treasury stock			9,868,000	38,837,000
Cumulative amount paid for repurchase of treasury stock	945,205,000		945,205,000		928,203,000
Remaining capacity under the stock repurchase program	47,600,000		47,600,000
Basic earnings per share:
Net earnings from continuing operations	(1,496,000)	9,438,000	(7,568,000)	21,941,000
Net earnings from discontinued operations	(48,000)	426,000	(1,580,000)	1,018,000
Net earnings (loss)	(1,544,000)	9,864,000	(9,148,000)	22,959,000
Net earnings (loss) attributable to noncontrolling interest		25,000		(60,000)
Net earnings attributable to Acxiom	(1,544,000)	9,839,000	(9,148,000)	23,019,000
Basic weighted-average shares outstanding	77,123,000	73,778,000	76,978,000	73,728,000
Net earnings (loss) from continuing operations (in dollars per share)	$ (0.02)	$ 0.13	$ (0.10)	$ 0.30
Net earnings from discontinued operations (in dollars per share)		$ 0.01	$ (0.02)	$ 0.01
Net earnings (in dollars per share)	$ (0.02)	$ 0.13	$ (0.12)	$ 0.31
Net earnings attributable to Acxiom (in dollars per share)	$ (0.02)	$ 0.13	$ (0.12)	$ 0.31
Diluted earnings per share:
Basic weighted-average shares outstanding	77,123,000	73,778,000	76,978,000	73,728,000
Dilutive effect of common stock options, warrants, and restricted stock as computed under the treasury stock method (in shares)		2,258,000		2,036,000
Diluted weighted-average shares outstanding	77,123,000	76,036,000	76,978,000	75,764,000
Net earnings (loss) from continuing operations (in dollars per share)	$ (0.02)	$ 0.12	$ (0.10)	$ 0.29
Net earnings (loss) from discontinued operations (in dollars per share)		$ 0.01	$ (0.02)	$ 0.01
Net earnings (in dollars per share)	$ (0.02)	$ 0.13	$ (0.12)	$ 0.30
Net earnings attributable to Acxiom (in dollars per share)	$ (0.02)	$ 0.13	$ (0.12)	$ 0.30
Stockholders' Equity
Number of shares outstanding under options, warrants and restricted stock units	3,446,000	2,224,000	1,813,000	3,390,000
Minimum
EARNINGS PER SHARE AND STOCKHOLDERS' EQUITY:
Range of exercise prices for options and warrants (in dollars per share)	$ 19.02	$ 21.46	$ 21.17	$ 21.46
Maximum
EARNINGS PER SHARE AND STOCKHOLDERS' EQUITY:
Range of exercise prices for options and warrants (in dollars per share)	$ 62.06	$ 62.06	$ 62.06	$ 62.06
2011 Common stock repurchase program
Stockholders' Equity
Cumulative shares repurchased	12,900,000		12,900,000
Cumulative amount paid for repurchase of treasury stock	$ 202,400,000		$ 202,400,000