EARNINGS PER SHARE AND STOCKHOLDERS' EQUITY: (Details) (USD $)	3 Months Ended		9 Months Ended			3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		1 Months Ended	9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Mar. 31, 2012	Dec. 31, 2012 Maximum	Dec. 31, 2011 Maximum	Dec. 31, 2012 Maximum	Dec. 31, 2011 Maximum	Dec. 31, 2012 Minimum	Dec. 31, 2011 Minimum	Dec. 31, 2012 Minimum	Dec. 31, 2011 Minimum	Aug. 31, 2011 2011 Common stock repurchase program	Dec. 31, 2012 2011 Common stock repurchase program
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	$ 17.76	$ 12.25	$ 13.10	$ 13.14
Stockholders' Equity
Maximum amount of common stock that may be repurchased														$ 200,000,000
Shares repurchased															4,100,000
Repurchase of treasury stock			62,722,000												62,700,000
Cumulative shares repurchased															9,900,000
Cumulative amount paid for repurchase of treasury stock	873,893,000		873,893,000		810,381,000										130,900,000
Remaining capacity under the stock repurchase program															69,100,000
Basic earnings per share:
Net earnings from continuing operations	14,449,000	1,837,000	44,020,000	22,775,000
Net earnings from discontinued operations		814,000		2,868,000
Net earnings	14,449,000	2,651,000	44,020,000	25,643,000
Net loss attributable to noncontrolling interest	(76,000)	(5,279,000)	(349,000)	(5,554,000)
Net earnings attributable to Acxiom	$ 14,525,000	$ 7,930,000	$ 44,369,000	$ 31,197,000
Basic weighted-average shares outstanding	74,103,000	78,189,000	75,195,000	80,039,000
Net earnings from continuing operations	$ 0.19	$ 0.02	$ 0.59	$ 0.28
Net earnings from discontinued operations		$ 0.01		$ 0.04
Net earnings	$ 0.19	$ 0.03	$ 0.59	$ 0.32
Net loss attributable to noncontrolling interest (in dollars per share)		$ (0.07)		$ (0.07)
Net earnings attributable to Acxiom (in dollars per share)	$ 0.20	$ 0.10	$ 0.59	$ 0.39
Diluted earnings per share:
Basic weighted-average shares outstanding	74,103,000	78,189,000	75,195,000	80,039,000
Dilutive effect of common stock options, warrants, and restricted stock as computed under the treasury stock method (in shares)	1,775,000	831,000	1,792,000	838,000
Diluted weighted-average shares outstanding	75,878,000	79,020,000	76,987,000	80,877,000
Continuing operations (in dollars per share)	$ 0.19	$ 0.02	$ 0.57	$ 0.28
Discontinued operations (in dollars per share)		$ 0.01		$ 0.04
Net earnings (in dollars per share)	$ 0.19	$ 0.03	$ 0.57	$ 0.32
Net loss attributable to noncontrolling interest (in dollars per share)		$ (0.07)		$ (0.07)
Net earnings (loss) attributable to Acxiom (in dollars per share)	$ 0.19	$ 0.10	$ 0.58	$ 0.39
Stockholders' Equity
Outstanding options and warrants for the purchase of common stock (in shares)	9,700,000		9,700,000
Outstanding restricted stock units for purchase of common stock (in shares)	1,200,000		1,200,000
Number of shares outstanding under options, warrants and restricted stock units	4,752,000	9,515,000	7,872,000	9,438,000