GOODWILL: (Details 2) (USD $)	3 Months Ended		12 Months Ended				3 Months Ended								3 Months Ended			3 Months Ended	12 Months Ended		3 Months Ended	12 Months Ended			3 Months Ended			3 Months Ended		12 Months Ended
	Jun. 30, 2012	Dec. 31, 2011	Mar. 31, 2013 component	Mar. 31, 2012	Mar. 31, 2011	Apr. 02, 2012 U.S. Marketing and Data Services	Mar. 31, 2013 Europe Marketing and Data Services	Apr. 02, 2012 Europe Marketing and Data Services	Apr. 02, 2012 Australia Marketing and Data Services	Apr. 02, 2012 China Marketing and Data Services	Apr. 02, 2012 Brazil Marketing and Data Services	Apr. 02, 2012 U.S. Infrastructure Management	Apr. 02, 2012 U.S. Other Services	Apr. 02, 2012 Europe Other Services	Mar. 31, 2011 Europe Information Services	Dec. 31, 2010 Europe Information Services	Dec. 31, 2010 APAC Information Services	Mar. 31, 2011 MENA Information Services	Mar. 31, 2011 MENA Information Services	Dec. 31, 2010 MENA Information Services	Dec. 31, 2011 Brazil Information Services	Mar. 31, 2012 Brazil Information Services	Sep. 30, 2011 Brazil Information Services	Dec. 31, 2010 Brazil Information Services	Mar. 31, 2011 Europe Information Products	Dec. 31, 2010 Europe Information Products	Dec. 31, 2010 APAC Information Products	Mar. 31, 2011 European operations	Mar. 31, 2011 International operations	Mar. 31, 2011 International operations
Goodwill information
Number of components tested for impairment			8
Goodwill			$ 381,129,000	$ 382,285,000	$ 397,989,000	$ 264,600,000		$ 19,500,000	$ 14,900,000	$ 6,000,000	$ 1,100,000	$ 71,500,000	$ 1,800,000	$ 2,900,000		$ 28,800,000	$ 10,800,000			$ 4,800,000			$ 4,100,000	$ 16,900,000		$ 66,200,000	$ 10,000,000
Impairment of goodwill and other intangibles		17,800,000		17,803,000	79,674,000													7,200,000			17,800,000								79,700,000
Impairment charge related to goodwill	0		0	(13,599,000)			0								15,400,000			4,800,000				13,800,000			57,100,000			72,500,000	77,300,000	77,300,000
Impairment charge related to other intangible assets															0			2,400,000	2,400,000			4,000,000							2,400,000
Remaining liability of earnout																					$ 0
Fair values in excess of the carrying value (as a percent)											11.00%