SEGMENT INFORMATION: (Details) (USD $) In Thousands, unless otherwise specified	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 segment	Mar. 31, 2012	Mar. 31, 2011
Information by business segment
Number of operating segments									3
Revenue:
Revenues	$ 277,131	$ 273,102	$ 277,467	$ 271,659	$ 287,255	$ 280,893	$ 286,432	$ 276,044	$ 1,099,359	$ 1,130,624	$ 1,113,755
Income (loss) from operations:
Income (loss) from operations	20,189	26,898	30,208	25,424	22,290	15,518	27,051	20,704	102,719	85,563	25,177
Depreciation and amortization:
Depreciation and amortization									116,208	134,662	146,355
Total assets:
Total assets	1,187,706				1,232,777				1,187,706	1,232,777
Marketing and Data Services
Revenue:
Revenues									767,738	771,714	736,105
Income (loss) from operations:
Income (loss) from operations									80,513	95,820	87,254
Depreciation and amortization:
Depreciation and amortization									52,782	61,443	69,428
Total assets:
Total assets	641,897				665,029				641,897	665,029
IT Infrastructure Management
Revenue:
Revenues									275,469	291,525	302,630
Income (loss) from operations:
Income (loss) from operations									29,330	24,988	24,467
Depreciation and amortization:
Depreciation and amortization									60,042	66,497	67,876
Total assets:
Total assets	316,009				326,673				316,009	326,673
Other services
Revenue:
Revenues									56,152	67,385	75,020
Income (loss) from operations:
Income (loss) from operations									(5,114)	(4,804)	(2,270)
Depreciation and amortization:
Depreciation and amortization									3,384	6,722	9,051
Total assets:
Total assets	18,696				20,293				18,696	20,293
Corporate
Income (loss) from operations:
Income (loss) from operations									(2,010)	(30,441)	(84,274)
Total assets:
Total assets	$ 211,104				$ 220,782				$ 211,104	$ 220,782