GOODWILL (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Dec. 31, 2011 Segment Component	Dec. 31, 2011 Marketing and data services	Dec. 31, 2011 Other services	Dec. 31, 2011 Information services	Mar. 31, 2011 US Information Products	Mar. 31, 2011 US Information Services
Asset Impairment Charges
Impairment charge related to goodwill	$ 13,599	$ 13,599
Goodwill
Goodwill at the beginning of the period	397,349	395,018	2,331		51,200	306,300
Purchase adjustments	1	1
Goodwill impairment	(13,599)	(13,599)
Change in foreign currency translation adjustment	(2,917)	(2,845)	(72)
Goodwill at the end of the period	$ 380,834	$ 378,575	$ 2,259		$ 51,200	$ 306,300
Passing margin component (as a percent)				20.00%
Number of reportable segments	2
Number of components tested for impairment	7