EARNINGS PER SHARE AND STOCKHOLDERS' EQUITY (Details) (USD $)	3 Months Ended		6 Months Ended			3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		1 Months Ended	6 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Mar. 31, 2012	Sep. 30, 2012 Maximum	Sep. 30, 2011 Maximum	Sep. 30, 2012 Maximum	Sep. 30, 2011 Maximum	Sep. 30, 2012 Minimum	Sep. 30, 2011 Minimum	Sep. 30, 2012 Minimum	Sep. 30, 2011 Minimum	Aug. 31, 2011 2011 Common stock repurchase program	Sep. 30, 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	$ 11.50	$ 15.31	$ 13.14
Stockholders' Equity
Maximum amount of common stock that may be repurchased														$ 150,000,000
Shares repurchased															3,200,000
Repurchase of treasury stock			47,100,000	34,100,000											47,200,000
Cumulative shares repurchased															9,000,000
Cumulative amount paid for repurchase of treasury stock	858,378,000		858,378,000		810,381,000										115,400,000
Remaining capacity under the stock repurchase program															34,600,000
Basic earnings per share:
Net earnings from continuing operations	16,372,000	11,839,000	29,571,000	20,939,000
Net earnings from discontinued operations		1,138,000		2,053,000
Net earnings	16,372,000	12,977,000	29,571,000	22,992,000
Net earnings (loss) attributable to noncontrolling interest	(139,000)	685,000	(273,000)	(275,000)
Net earnings attributable to Acxiom	$ 16,511,000	$ 12,292,000	$ 29,844,000	$ 23,267,000
Basic weighted-average shares outstanding	75,009,000	80,985,000	75,741,000	80,963,000
Net earnings from continuing operations	$ 0.22	$ 0.15	$ 0.39	$ 0.26
Net earnings from discontinued operations		$ 0.01		$ 0.03
Net earnings	$ 0.22	$ 0.16	$ 0.39	$ 0.28
Net earnings attributable to noncontrolling interest (in dollars per share)		$ 0.01
Net earnings attributable to Acxiom (in dollars per share)	$ 0.22	$ 0.15	$ 0.39	$ 0.29
Diluted earnings per share:
Basic weighted-average shares outstanding	75,009,000	80,985,000	75,741,000	80,963,000
Dilutive effect of common stock options, warrants, and restricted stock as computed under the treasury stock method (in shares)	2,016,000	612,000	1,800,000	842,000
Diluted weighted-average shares outstanding	77,025,000	81,597,000	77,541,000	81,805,000
Continuing operations (in dollars per share)	$ 0.21	$ 0.15	$ 0.38	$ 0.26
Discontinued operations (in dollars per share)		$ 0.01		$ 0.03
Net earnings (in dollars per share)	$ 0.21	$ 0.16	$ 0.38	$ 0.28
Net earnings attributable to noncontrolling interest (in dollars per share)		$ 0.01
Net earnings (loss) attributable to Acxiom (in dollars per share)	$ 0.21	$ 0.15	$ 0.38	$ 0.28
Stockholders' Equity
Outstanding options and warrants for the purchase of common stock (in shares)	9,800,000		9,800,000
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	4,762,000	10,582,000	7,093,000	10,069,000