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		0 Months Ended	6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Mar. 31, 2013	Sep. 30, 2013 Minimum	Sep. 30, 2012 Minimum	Sep. 30, 2013 Minimum	Sep. 30, 2012 Minimum	Sep. 30, 2013 Maximum	Sep. 30, 2012 Maximum	Sep. 30, 2013 Maximum	Sep. 30, 2012 Maximum	Aug. 29, 2011 2011 Common stock repurchase program	Sep. 30, 2013 2011 Common stock repurchase program
EARNINGS PER SHARE AND STOCKHOLDERS' EQUITY:
Range of exercise prices for options and warrants (in dollars per share)						$ 21.46	$ 17.76	$ 21.46	$ 15.31	$ 62.06	$ 62.06	$ 62.06	$ 62.06
Stockholders' Equity
Maximum amount of common stock that may be repurchased														$ 200,000,000
Shares repurchased															1,600,000
Repurchase of treasury stock			38,837,000	47,100,000											38,800,000
Cumulative shares repurchased															12,000,000
Cumulative amount paid for repurchase of treasury stock	923,771,000		923,771,000		882,959,000										178,800,000
Remaining capacity under the stock repurchase program															21,200,000
Basic earnings per share:
Net earnings	9,864,000	16,372,000	22,959,000	29,571,000
Net gain (loss) attributable to noncontrolling interest	25,000	(139,000)	(60,000)	(273,000)
Net earnings attributable to Acxiom	9,839,000	16,511,000	23,019,000	29,844,000
Basic weighted-average shares outstanding	73,778,000	75,009,000	73,728,000	75,741,000
Net earnings (in dollars per share)	$ 0.13	$ 0.22	$ 0.31	$ 0.39
Net earnings attributable to Acxiom (in dollars per share)	$ 0.13	$ 0.22	$ 0.31	$ 0.39
Diluted earnings per share:
Basic weighted-average shares outstanding	73,778,000	75,009,000	73,728,000	75,741,000
Dilutive effect of common stock options, warrants, and restricted stock as computed under the treasury stock method (in shares)	2,258,000	2,016,000	2,036,000	1,800,000
Diluted weighted-average shares outstanding	76,036,000	77,025,000	75,764,000	77,541,000
Net earnings (in dollars per share)	$ 0.13	$ 0.21	$ 0.30	$ 0.38
Net earnings (loss) attributable to Acxiom (in dollars per share)	$ 0.13	$ 0.21	$ 0.30	$ 0.38
Stockholders' Equity
Outstanding options and warrants for the purchase of common stock (in shares)	8,500,000		8,500,000
Outstanding restricted stock units for purchase of common stock (in shares)	2,200,000		2,200,000
Number of shares outstanding under options, warrants and restricted stock units	2,224,000	4,762,000	3,390,000	7,093,000
Accumulated Other Comprehensive Income
Foreign currency translation	13,088,000		13,088,000		12,175,000
Unrealized loss on interest rate swap	(334,000)		(334,000)		(752,000)
Accumulated Other Comprehensive Income	$ 12,754,000		$ 12,754,000		$ 11,423,000