RESTRUCTURING, IMPAIRMENT AND OTHER CHARGES: (Details) (USD $)	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Restructuring activity
Balance at the beginning of the period	$ 20,646,000	$ 15,104,000	$ 15,774,000
Restructuring charges and adjustments	2,894,000	12,778,000	4,435,000
Payments	(10,830,000)	(7,236,000)	(5,105,000)
Balance at the end of the period	12,710,000	20,646,000	15,104,000
Lease accruals
Restructuring activity
Balance at the end of the period	1,600,000
Associate-related reserves
Restructuring activity
Balance at the beginning of the period	9,597,000	5,562,000	2,870,000
Restructuring charges and adjustments	2,836,000	10,126,000	5,773,000
Payments	(8,744,000)	(6,091,000)	(3,081,000)
Balance at the end of the period	3,689,000	9,597,000	5,562,000
Ongoing contracts
Restructuring activity
Balance at the beginning of the period	11,049,000	9,542,000	12,904,000
Restructuring charges and adjustments	58,000	2,652,000	(1,338,000)
Payments	(2,086,000)	(1,145,000)	(2,024,000)
Balance at the end of the period	9,021,000	11,049,000	9,542,000
Fiscal 2011
Restructuring activity
Adjustments			1,700,000
Gains, Losses and Other Items
Restructuring charges and adjustments			4,400,000
Fiscal 2011 | Associate-related reserves
Restructuring activity
Restructuring charges			3,400,000
Fiscal 2011 | Associate-related reserves | United States, Australia, and Europe
Restructuring activity
Restructuring charges			3,400,000
Fiscal 2011 | Executive leadership transition
Restructuring activity
Balance at the end of the period			2,700,000
Restructuring charges			2,700,000
Gains, Losses and Other Items
Number of lump sum payments of transition charges			1
Number of times of officer's annual salary and bonus opportunity			2
Fiscal 2012
Restructuring activity
Adjustments		300,000
Gains, Losses and Other Items
Restructuring charges and adjustments		12,800,000
Fiscal 2012 | Lease accruals
Restructuring activity
Restructuring charges		2,600,000
Fiscal 2012 | Associate-related reserves
Restructuring activity
Restructuring charges		9,900,000
Fiscal 2012 | Associate-related reserves | United States, Australia, Europe, and Brazil
Restructuring activity
Balance at the end of the period	1,200,000
Fiscal 2012 | Associate-related reserves | United States, Australia, and Europe
Restructuring activity
Restructuring charges		9,900,000
Fiscal 2013
Gains, Losses and Other Items
Restructuring charges and adjustments	2,900,000
Fiscal 2013 | Lease accruals
Restructuring activity
Balance at the end of the period	100,000
Restructuring charges	100,000
Fiscal 2013 | Associate-related reserves | United States, Australia, and Europe
Restructuring activity
Balance at the end of the period	2,500,000
Restructuring charges	2,800,000
Fiscal 2008 and 2009 | Lease accruals
Restructuring activity
Balance at the end of the period	$ 7,300,000