SEGMENT INFORMATION: (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenues:
Total revenues	$ 207,345	$ 204,248	$ 404,240	$ 390,931
Gross profit:
Total gross profit	86,033	81,403	165,219	154,996
Income (loss) from operations:
Total loss from operations	(2,056)	(6,443)	(4,925)	(19,529)
Operating segment | Marketing services and audience solutions
Revenues:
Total revenues	185,101	190,776	361,377	373,125
Gross profit:
Total gross profit	76,030	82,652	148,049	159,876
Income (loss) from operations:
Total loss from operations	41,586	52,302	79,873	98,523
Operating segment | Connectivity
Revenues:
Total revenues	22,224	13,472	42,863	17,806
Gross profit:
Total gross profit	10,081	(1,249)	18,690	(4,880)
Income (loss) from operations:
Total loss from operations	(10,192)	(20,277)	(18,217)	(34,538)
Corporate
Gross profit:
Total gross profit	(78)		(1,520)
Income (loss) from operations:
Total loss from operations	$ (33,450)	$ (38,468)	$ (66,581)	$ (83,514)