DISCONTINUED OPERATIONS: (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Jul. 31, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Mar. 31, 2015
Operating expenses:
Earnings (loss) from discontinued operations, net of tax		$ 12,068	$ 5,557	$ 16,211	$ 8,694
Carrying amounts of the major classes of assets and liabilities
Assets from discontinued operations		2,000		2,000		$ 172,284
Liabilities from discontinued operations		2,436		2,436		57,433
ITO
DIVESTITURES
Proceeds from Sale of Property Held-for-sale	$ 131,300
Stated sale price of business	140,000
Closing adjustments and transaction costs	8,700
Contingent payments to be received subject to certain performance metrics	50,000
Allocated interest expense		100	300	400	600
Earnings from discontinued operations
Revenues		16,830	55,789	69,410	111,321
Cost of revenue		10,269	42,745	50,837	85,849
Gross profit		6,561	13,044	18,573	25,472
Operating expenses:
Sales and marketing		194	822	1,192	1,376
General and administrative		2,285	2,374	6,053	5,316
Gain on sale of discontinued operations		(10,360)		(10,360)
Gains, losses and other items, net			96		420
Total operating expenses		(7,881)	3,292	(3,115)	7,112
Income from discontinued operations		14,442	9,752	21,688	18,360
Interest expense		(117)	(575)	(681)	(1,199)
Other, net		(227)	47	(230)	(259)
Earnings from discontinued operations before income taxes		14,098	9,224	20,777	16,902
Gain on sale of discontinued operations		10,360		10,360
Income taxes		2,030	3,619	4,566	6,628
Earnings (loss) from discontinued operations, net of tax		12,068	5,605	16,211	10,274
Carrying amounts of the major classes of assets and liabilities
Trade accounts receivable, net						35,743
Deferred income taxes						2,762
Other current assets		2,000		2,000		10,707
Property and equipment, net of accumulated depreciation and amortization						44,336
Goodwill						71,508
Purchased software licenses, net of accumulated amortization						3,943
Other assets, net						3,173
Assets from discontinued operations		2,000		2,000		172,172
Current installments of long-term debt						653
Trade accounts payable						8,857
Accrued expenses		1,522		1,522		7,480
Deferred revenue						3,658
Long-term debt						6,684
Deferred income taxes						22,716
Other liabilities						6,377
Liabilities from discontinued operations		1,522		1,522		56,425
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax		14,098	9,224	20,777	16,902
Discontinued Operation, Continuing Involvement [Abstract]
Cash inflows and outflows included in the statement of cash flows		700		100
ITO | Loss from continuing operations
Discontinued Operation, Continuing Involvement [Abstract]
Net amount of revenues and expenses resulting from continued involvement with disposal group		1,200		1,200
ITO | Credit Agreement
DIVESTITURES
Proceeds from sale utilized to repay outstanding indebtedness	$ 55,000
Allocated interest expense				400
ITO | Maximum | Credit Agreement
DIVESTITURES
Maximum amount of common stock that may be repurchased		100,000		100,000
U.K. call center operation
Earnings from discontinued operations
Revenues			1,478		7,240
Operating expenses:
Gain on sale of discontinued operations					1,875
Earnings from discontinued operations before income taxes			(48)		295
Gain on sale of discontinued operations					(1,875)
Earnings (loss) from discontinued operations, net of tax			(48)		(1,580)
Carrying amounts of the major classes of assets and liabilities
Trade accounts receivable, net						112
Assets from discontinued operations						112
Other accrued expenses		914		914		1,008
Liabilities from discontinued operations		$ 914		$ 914		$ 1,008
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax			$ (48)		$ 295