SEGMENT INFORMATION: (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 segment	Sep. 30, 2011
Information by business segment
Number of operating segments			3
Revenue:
Revenues	$ 277,467	$ 286,432	$ 549,126	$ 562,476
Income (loss) from operations:
Income (loss) from operations	30,208	27,051	55,632	47,755
Marketing and Data Services
Revenue:
Revenues	194,409	195,857	380,148	380,853
Income (loss) from operations:
Income (loss) from operations	23,331	27,078	41,306	44,338
IT Infrastructure Management
Revenue:
Revenues	70,061	73,712	140,351	146,762
Income (loss) from operations:
Income (loss) from operations	8,520	5,091	17,351	9,338
Other services
Revenue:
Revenues	12,997	16,863	28,627	34,861
Income (loss) from operations:
Income (loss) from operations	(1,611)	(2,653)	(2,833)	(3,212)
Corporate
Income (loss) from operations:
Income (loss) from operations	$ (32)	$ (2,465)	$ (192)	$ (2,709)