UNAUDITED SELECTED QUARTERLY FINANCIAL DATA: (Details) (USD $)	3 Months Ended								12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
UNAUDITED SELECTED QUARTERLY FINANCIAL DATA:
Revenue	$ 277,131,000	$ 273,102,000	$ 277,467,000	$ 271,659,000	$ 287,255,000	$ 280,893,000	$ 286,432,000	$ 276,044,000	$ 1,099,359,000	$ 1,130,624,000	$ 1,113,755,000
Gross profit	63,544,000	64,075,000	67,581,000	62,333,000	73,467,000	66,968,000	68,945,000	57,755,000
Income from operations	20,189,000	26,898,000	30,208,000	25,424,000	22,290,000	15,518,000	27,051,000	20,704,000	102,719,000	85,563,000	25,177,000
Earnings from discontinued operations, net of tax					31,031,000	814,000	1,138,000	916,000		33,899,000	3,396,000
Net earnings	13,099,000	14,449,000	16,372,000	13,199,000	45,873,000	2,651,000	12,977,000	10,015,000	57,119,000	37,617,000	(31,838,000)
Net earnings attributable to Acxiom	13,238,000	14,525,000	16,511,000	13,333,000	46,066,000	7,930,000	12,292,000	10,975,000	57,607,000	77,263,000	(23,147,000)
Basic earnings (loss) per share:
From continuing operations (in dollars per share)					$ 0.19	$ 0.02	$ 0.15	$ 0.11	$ 0.76	$ 0.47	$ (0.40)
From discontinued operations (in dollars per share)					$ 0.40	$ 0.01	$ 0.01	$ 0.01		$ 0.43	$ 0.04
Net earnings (in dollars per share)	$ 0.18	$ 0.19	$ 0.22	$ 0.17					$ 0.76	$ 0.90	$ (0.36)
Attributable to Acxiom stockholders (in dollars per share)	$ 0.18	$ 0.20	$ 0.22	$ 0.17	$ 0.59	$ 0.10	$ 0.15	$ 0.14	$ 0.77	$ 0.97	$ (0.29)
Diluted earnings (loss) per share:
From continuing operations (in dollars per share)					$ 0.19	$ 0.02	$ 0.15	$ 0.11	$ 0.75	$ 0.47	$ (0.40)
From discontinued operations (in dollars per share)					$ 0.39	$ 0.01	$ 0.01	$ 0.01		$ 0.42	$ 0.04
Net earnings (in dollars per share)	$ 0.17	$ 0.19	$ 0.21	$ 0.17					$ 0.75	$ 0.89	$ (0.36)
Attributable to Acxiom stockholders (in dollars per share)	$ 0.18	$ 0.19	$ 0.21	$ 0.17	$ 0.58	$ 0.10	$ 0.15	$ 0.13	$ 0.75	$ 0.96	$ (0.29)
Statement
Impairment of goodwill and other intangibles						17,800,000				17,803,000	79,674,000
Gains, losses and other items, net									2,010,000	12,638,000	4,600,000
Brazil operation
Statement
Impairment of goodwill and other intangibles						17,800,000
Earnout liability						0	2,600,000
MENA subsidiary
Statement
Loss on disposal of subsidiary										3,400,000
Gains, losses and other items, net
Statement
Gains, losses and other items, net					12,600,000				2,010,000	12,638,000	4,600,000
Restructuring charages	2,900,000								2,894,000	12,778,000	4,435,000
Other credit offset in restructuring charges	900,000								884,000	(2,458,000)	(1,223,000)
Gains, losses and other items, net | MENA subsidiary
Statement
Loss on disposal							(2,500,000)
Noncontrolling interest | MENA subsidiary
Statement
Loss on disposal of subsidiary							$ 900,000			$ 900,000